/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 13:45:53,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 13:45:53,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 13:45:53,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 13:45:53,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 13:45:53,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 13:45:53,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 13:45:53,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 13:45:53,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 13:45:53,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 13:45:53,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 13:45:53,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 13:45:53,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 13:45:53,549 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 13:45:53,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 13:45:53,550 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 13:45:53,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 13:45:53,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 13:45:53,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 13:45:53,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 13:45:53,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 13:45:53,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:45:53,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 13:45:53,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 13:45:53,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 13:45:53,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 13:45:53,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 13:45:53,552 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 13:45:53,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 13:45:53,553 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 13:45:53,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 13:45:53,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 13:45:53,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 13:45:53,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 13:45:53,754 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 13:45:53,756 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 13:45:53,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl [2022-02-16 13:45:53,757 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl' [2022-02-16 13:45:53,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 13:45:53,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 13:45:53,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 13:45:53,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 13:45:53,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 13:45:53,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,822 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 13:45:53,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 13:45:53,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 13:45:53,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 13:45:53,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 13:45:53,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 13:45:53,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 13:45:53,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 13:45:53,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 13:45:53,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/1) ... [2022-02-16 13:45:53,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:45:53,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:45:53,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-16 13:45:53,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-16 13:45:53,888 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 13:45:53,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 13:45:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 13:45:53,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 13:45:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 13:45:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 13:45:53,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 13:45:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 13:45:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 13:45:53,890 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-16 13:45:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-16 13:45:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-16 13:45:53,890 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 13:45:53,948 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 13:45:53,949 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 13:45:54,051 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 13:45:54,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 13:45:54,141 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-16 13:45:54,142 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:45:54 BoogieIcfgContainer [2022-02-16 13:45:54,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 13:45:54,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 13:45:54,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 13:45:54,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 13:45:54,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:45:53" (1/2) ... [2022-02-16 13:45:54,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b516b1 and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:45:54, skipping insertion in model container [2022-02-16 13:45:54,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:45:54" (2/2) ... [2022-02-16 13:45:54,174 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2022-02-16 13:45:54,177 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 13:45:54,177 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 13:45:54,178 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 13:45:54,178 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 13:45:54,241 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-16 13:45:54,266 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:45:54,270 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-16 13:45:54,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-16 13:45:54,276 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-02-16 13:45:54,307 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:57,415 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 195797 transitions and produced 94137 states. [2022-02-16 13:45:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 94137 states, 60337 states have (on average 1.7915375308682897) internal successors, (108096), 94136 states have internal predecessors, (108096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:45:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-16 13:45:59,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:45:59,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:45:59,212 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:45:59,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:45:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash 579980656, now seen corresponding path program 1 times [2022-02-16 13:45:59,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:45:59,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078324922] [2022-02-16 13:45:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:45:59,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:45:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:45:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:45:59,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:45:59,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078324922] [2022-02-16 13:45:59,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078324922] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:45:59,405 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:45:59,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-16 13:45:59,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693842912] [2022-02-16 13:45:59,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:45:59,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 13:45:59,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:45:59,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 13:45:59,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-16 13:46:00,040 INFO L87 Difference]: Start difference. First operand has 94137 states, 60337 states have (on average 1.7915375308682897) internal successors, (108096), 94136 states have internal predecessors, (108096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:01,896 INFO L93 Difference]: Finished difference Result 93253 states and 107206 transitions. [2022-02-16 13:46:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:46:01,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-16 13:46:01,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:02,203 INFO L225 Difference]: With dead ends: 93253 [2022-02-16 13:46:02,204 INFO L226 Difference]: Without dead ends: 33315 [2022-02-16 13:46:02,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-02-16 13:46:02,207 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:02,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 29 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:46:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33315 states. [2022-02-16 13:46:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33315 to 83. [2022-02-16 13:46:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.402439024390244) internal successors, (197), 82 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 197 transitions. [2022-02-16 13:46:02,499 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 197 transitions. Word has length 17 [2022-02-16 13:46:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:02,499 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 197 transitions. [2022-02-16 13:46:02,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 197 transitions. [2022-02-16 13:46:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-16 13:46:02,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:02,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:02,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 13:46:02,504 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:02,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1775123294, now seen corresponding path program 1 times [2022-02-16 13:46:02,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:02,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865792976] [2022-02-16 13:46:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:02,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:46:02,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:02,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865792976] [2022-02-16 13:46:02,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865792976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:46:02,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:46:02,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 13:46:02,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26969433] [2022-02-16 13:46:02,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:46:02,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:46:02,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:46:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:46:02,589 INFO L87 Difference]: Start difference. First operand 83 states and 197 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:02,648 INFO L93 Difference]: Finished difference Result 143 states and 337 transitions. [2022-02-16 13:46:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:46:02,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-16 13:46:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:02,649 INFO L225 Difference]: With dead ends: 143 [2022-02-16 13:46:02,649 INFO L226 Difference]: Without dead ends: 101 [2022-02-16 13:46:02,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:46:02,650 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:02,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:46:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-16 13:46:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-16 13:46:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.49) internal successors, (249), 100 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 249 transitions. [2022-02-16 13:46:02,656 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 249 transitions. Word has length 18 [2022-02-16 13:46:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:02,657 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 249 transitions. [2022-02-16 13:46:02,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 249 transitions. [2022-02-16 13:46:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:02,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:02,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:02,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 13:46:02,658 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:02,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1579276621, now seen corresponding path program 1 times [2022-02-16 13:46:02,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:02,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760858933] [2022-02-16 13:46:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:02,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:02,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:02,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760858933] [2022-02-16 13:46:02,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760858933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:02,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894712611] [2022-02-16 13:46:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:02,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:02,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:02,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 13:46:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:02,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:02,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:03,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 89 [2022-02-16 13:46:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:03,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:04,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:04,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 105 [2022-02-16 13:46:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:04,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894712611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:04,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:04,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-02-16 13:46:04,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210499933] [2022-02-16 13:46:04,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:04,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:46:04,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:46:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:46:04,181 INFO L87 Difference]: Start difference. First operand 101 states and 249 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:05,896 INFO L93 Difference]: Finished difference Result 262 states and 647 transitions. [2022-02-16 13:46:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:46:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:05,897 INFO L225 Difference]: With dead ends: 262 [2022-02-16 13:46:05,897 INFO L226 Difference]: Without dead ends: 229 [2022-02-16 13:46:05,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:46:05,898 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 254 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:05,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 164 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:46:05,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-16 13:46:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 125. [2022-02-16 13:46:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.596774193548387) internal successors, (322), 124 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 322 transitions. [2022-02-16 13:46:05,903 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 322 transitions. Word has length 19 [2022-02-16 13:46:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:05,903 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 322 transitions. [2022-02-16 13:46:05,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 322 transitions. [2022-02-16 13:46:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:05,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:05,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:05,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:06,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:06,139 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1387991667, now seen corresponding path program 2 times [2022-02-16 13:46:06,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:06,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657241136] [2022-02-16 13:46:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:06,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:06,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:06,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657241136] [2022-02-16 13:46:06,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657241136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:06,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182393034] [2022-02-16 13:46:06,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:46:06,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:06,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:06,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:06,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 13:46:06,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:46:06,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:06,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-16 13:46:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:06,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 115 [2022-02-16 13:46:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:06,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:07,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:07,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 88 [2022-02-16 13:46:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:07,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182393034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:07,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:07,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-16 13:46:07,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576355294] [2022-02-16 13:46:07,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:07,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:46:07,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:07,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:46:07,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:46:07,239 INFO L87 Difference]: Start difference. First operand 125 states and 322 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:07,733 INFO L93 Difference]: Finished difference Result 199 states and 492 transitions. [2022-02-16 13:46:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:46:07,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:07,735 INFO L225 Difference]: With dead ends: 199 [2022-02-16 13:46:07,735 INFO L226 Difference]: Without dead ends: 189 [2022-02-16 13:46:07,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:46:07,736 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:07,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 87 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:46:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-16 13:46:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 133. [2022-02-16 13:46:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.6666666666666665) internal successors, (352), 132 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 352 transitions. [2022-02-16 13:46:07,741 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 352 transitions. Word has length 19 [2022-02-16 13:46:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:07,741 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 352 transitions. [2022-02-16 13:46:07,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 352 transitions. [2022-02-16 13:46:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:07,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:07,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:07,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:07,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-16 13:46:07,958 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:07,959 INFO L85 PathProgramCache]: Analyzing trace with hash -744850377, now seen corresponding path program 3 times [2022-02-16 13:46:07,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:07,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877781345] [2022-02-16 13:46:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:07,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:08,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:08,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877781345] [2022-02-16 13:46:08,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877781345] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:08,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987671322] [2022-02-16 13:46:08,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:46:08,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:08,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:08,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:08,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 13:46:08,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:46:08,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:08,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-16 13:46:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:08,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2022-02-16 13:46:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:08,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:09,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:09,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 105 [2022-02-16 13:46:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:09,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987671322] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:09,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:09,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-16 13:46:09,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427133410] [2022-02-16 13:46:09,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:09,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:46:09,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:09,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:46:09,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:46:09,487 INFO L87 Difference]: Start difference. First operand 133 states and 352 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:12,590 INFO L93 Difference]: Finished difference Result 425 states and 922 transitions. [2022-02-16 13:46:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-16 13:46:12,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:12,592 INFO L225 Difference]: With dead ends: 425 [2022-02-16 13:46:12,592 INFO L226 Difference]: Without dead ends: 363 [2022-02-16 13:46:12,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=421, Invalid=1741, Unknown=0, NotChecked=0, Total=2162 [2022-02-16 13:46:12,593 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 379 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:12,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 291 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 13:46:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-02-16 13:46:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 155. [2022-02-16 13:46:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8051948051948052) internal successors, (432), 154 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 432 transitions. [2022-02-16 13:46:12,598 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 432 transitions. Word has length 19 [2022-02-16 13:46:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:12,598 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 432 transitions. [2022-02-16 13:46:12,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 432 transitions. [2022-02-16 13:46:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:12,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:12,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:12,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:12,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:12,811 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1381317231, now seen corresponding path program 4 times [2022-02-16 13:46:12,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:12,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890779512] [2022-02-16 13:46:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:12,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:12,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:12,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890779512] [2022-02-16 13:46:12,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890779512] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:12,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033378312] [2022-02-16 13:46:12,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:46:12,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:12,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:12,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:12,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 13:46:12,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:46:13,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:13,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:13,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:13,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 108 [2022-02-16 13:46:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:13,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:14,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:14,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2022-02-16 13:46:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:14,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033378312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:14,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:14,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-02-16 13:46:14,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062197929] [2022-02-16 13:46:14,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:14,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:46:14,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:46:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:46:14,229 INFO L87 Difference]: Start difference. First operand 155 states and 432 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:15,836 INFO L93 Difference]: Finished difference Result 291 states and 689 transitions. [2022-02-16 13:46:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:46:15,836 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:15,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:15,837 INFO L225 Difference]: With dead ends: 291 [2022-02-16 13:46:15,837 INFO L226 Difference]: Without dead ends: 269 [2022-02-16 13:46:15,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 13:46:15,838 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 223 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:15,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 175 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:46:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-16 13:46:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 164. [2022-02-16 13:46:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.8404907975460123) internal successors, (463), 163 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 463 transitions. [2022-02-16 13:46:15,842 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 463 transitions. Word has length 19 [2022-02-16 13:46:15,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:15,842 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 463 transitions. [2022-02-16 13:46:15,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:15,842 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 463 transitions. [2022-02-16 13:46:15,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:15,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:15,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:15,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:16,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:16,052 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash 600982767, now seen corresponding path program 5 times [2022-02-16 13:46:16,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:16,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444865746] [2022-02-16 13:46:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:16,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:16,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:16,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444865746] [2022-02-16 13:46:16,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444865746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:16,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235764398] [2022-02-16 13:46:16,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:46:16,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:16,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:16,228 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:16,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 13:46:16,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:46:16,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-16 13:46:16,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:16,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-02-16 13:46:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:17,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:17,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:17,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2022-02-16 13:46:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:17,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235764398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:17,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:17,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-02-16 13:46:17,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017126880] [2022-02-16 13:46:17,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:17,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:46:17,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:17,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:46:17,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:46:17,735 INFO L87 Difference]: Start difference. First operand 164 states and 463 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:20,402 INFO L93 Difference]: Finished difference Result 569 states and 1165 transitions. [2022-02-16 13:46:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-16 13:46:20,403 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:20,404 INFO L225 Difference]: With dead ends: 569 [2022-02-16 13:46:20,404 INFO L226 Difference]: Without dead ends: 482 [2022-02-16 13:46:20,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=514, Invalid=2036, Unknown=0, NotChecked=0, Total=2550 [2022-02-16 13:46:20,405 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 495 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:20,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 217 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:46:20,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-02-16 13:46:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 185. [2022-02-16 13:46:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9565217391304346) internal successors, (544), 184 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 544 transitions. [2022-02-16 13:46:20,411 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 544 transitions. Word has length 19 [2022-02-16 13:46:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:20,411 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 544 transitions. [2022-02-16 13:46:20,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 544 transitions. [2022-02-16 13:46:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:20,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:20,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:20,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-16 13:46:20,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:20,613 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1757596693, now seen corresponding path program 6 times [2022-02-16 13:46:20,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:20,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213668700] [2022-02-16 13:46:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:20,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:20,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:20,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213668700] [2022-02-16 13:46:20,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213668700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:20,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845524410] [2022-02-16 13:46:20,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:46:20,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:20,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:20,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:20,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 13:46:20,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:46:20,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-16 13:46:20,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:21,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2022-02-16 13:46:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:21,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:21,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:21,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 112 [2022-02-16 13:46:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:21,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845524410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:21,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:21,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-16 13:46:21,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935348239] [2022-02-16 13:46:21,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:21,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:46:21,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:46:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:46:21,681 INFO L87 Difference]: Start difference. First operand 185 states and 544 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:22,290 INFO L93 Difference]: Finished difference Result 317 states and 792 transitions. [2022-02-16 13:46:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:46:22,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:22,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:22,291 INFO L225 Difference]: With dead ends: 317 [2022-02-16 13:46:22,291 INFO L226 Difference]: Without dead ends: 233 [2022-02-16 13:46:22,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:46:22,292 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 157 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:22,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 131 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:46:22,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-02-16 13:46:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 189. [2022-02-16 13:46:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9148936170212765) internal successors, (548), 188 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 548 transitions. [2022-02-16 13:46:22,296 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 548 transitions. Word has length 19 [2022-02-16 13:46:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:22,296 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 548 transitions. [2022-02-16 13:46:22,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 548 transitions. [2022-02-16 13:46:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:22,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:22,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:22,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:22,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:22,512 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:22,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1905582315, now seen corresponding path program 7 times [2022-02-16 13:46:22,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:22,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291321649] [2022-02-16 13:46:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:22,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:22,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:22,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291321649] [2022-02-16 13:46:22,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291321649] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:22,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837859820] [2022-02-16 13:46:22,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:46:22,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:22,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:22,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:22,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 13:46:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:22,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:22,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:22,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2022-02-16 13:46:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:23,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:23,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:23,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 130 [2022-02-16 13:46:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:23,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837859820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:23,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:23,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-16 13:46:23,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146465961] [2022-02-16 13:46:23,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:23,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:46:23,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:23,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:46:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:46:23,704 INFO L87 Difference]: Start difference. First operand 189 states and 548 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:24,137 INFO L93 Difference]: Finished difference Result 249 states and 688 transitions. [2022-02-16 13:46:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:46:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:24,138 INFO L225 Difference]: With dead ends: 249 [2022-02-16 13:46:24,139 INFO L226 Difference]: Without dead ends: 233 [2022-02-16 13:46:24,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:46:24,139 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 92 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:24,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 87 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:46:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-02-16 13:46:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 193. [2022-02-16 13:46:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9427083333333335) internal successors, (565), 192 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 565 transitions. [2022-02-16 13:46:24,145 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 565 transitions. Word has length 19 [2022-02-16 13:46:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:24,145 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 565 transitions. [2022-02-16 13:46:24,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 565 transitions. [2022-02-16 13:46:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:24,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:24,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:24,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:24,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:24,360 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash -227259729, now seen corresponding path program 8 times [2022-02-16 13:46:24,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:24,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649056176] [2022-02-16 13:46:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:24,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:24,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:24,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649056176] [2022-02-16 13:46:24,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649056176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:24,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902866404] [2022-02-16 13:46:24,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:46:24,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:24,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:24,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:24,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 13:46:24,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:46:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:24,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:24,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 124 [2022-02-16 13:46:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:25,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:25,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:25,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-02-16 13:46:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:25,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902866404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:25,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:25,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-16 13:46:25,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570404926] [2022-02-16 13:46:25,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:25,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:46:25,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:25,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:46:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:46:25,517 INFO L87 Difference]: Start difference. First operand 193 states and 565 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:26,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:26,367 INFO L93 Difference]: Finished difference Result 284 states and 726 transitions. [2022-02-16 13:46:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:46:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:26,368 INFO L225 Difference]: With dead ends: 284 [2022-02-16 13:46:26,368 INFO L226 Difference]: Without dead ends: 245 [2022-02-16 13:46:26,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 13:46:26,369 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 194 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:26,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 139 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:46:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-16 13:46:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 189. [2022-02-16 13:46:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9148936170212765) internal successors, (548), 188 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 548 transitions. [2022-02-16 13:46:26,379 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 548 transitions. Word has length 19 [2022-02-16 13:46:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:26,379 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 548 transitions. [2022-02-16 13:46:26,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 548 transitions. [2022-02-16 13:46:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:26,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:26,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:26,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-16 13:46:26,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-16 13:46:26,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash -863726583, now seen corresponding path program 9 times [2022-02-16 13:46:26,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:26,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094027355] [2022-02-16 13:46:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:26,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:26,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:26,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094027355] [2022-02-16 13:46:26,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094027355] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:26,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619765090] [2022-02-16 13:46:26,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:46:26,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:26,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:26,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 13:46:26,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:46:26,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:26,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:26,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:26,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2022-02-16 13:46:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:27,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:27,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:27,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 95 [2022-02-16 13:46:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:27,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619765090] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:27,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:27,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-02-16 13:46:27,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135273588] [2022-02-16 13:46:27,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:27,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:46:27,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:27,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:46:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:46:27,701 INFO L87 Difference]: Start difference. First operand 189 states and 548 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:28,433 INFO L93 Difference]: Finished difference Result 298 states and 750 transitions. [2022-02-16 13:46:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:46:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:28,434 INFO L225 Difference]: With dead ends: 298 [2022-02-16 13:46:28,434 INFO L226 Difference]: Without dead ends: 275 [2022-02-16 13:46:28,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 13:46:28,435 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 234 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:28,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 168 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:46:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-16 13:46:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 195. [2022-02-16 13:46:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.948453608247423) internal successors, (572), 194 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 572 transitions. [2022-02-16 13:46:28,439 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 572 transitions. Word has length 19 [2022-02-16 13:46:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:28,439 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 572 transitions. [2022-02-16 13:46:28,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 572 transitions. [2022-02-16 13:46:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:28,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:28,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:28,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:28,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:28,656 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:28,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1373503035, now seen corresponding path program 10 times [2022-02-16 13:46:28,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:28,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617005541] [2022-02-16 13:46:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:28,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:28,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:28,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617005541] [2022-02-16 13:46:28,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617005541] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:28,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128245671] [2022-02-16 13:46:28,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:46:28,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:28,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:28,802 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:28,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 13:46:28,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:46:28,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:28,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:28,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:29,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 99 [2022-02-16 13:46:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:29,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:29,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:29,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 112 [2022-02-16 13:46:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:29,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128245671] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:29,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:29,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:29,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557038595] [2022-02-16 13:46:29,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:29,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:29,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:29,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:29,997 INFO L87 Difference]: Start difference. First operand 195 states and 572 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:32,243 INFO L93 Difference]: Finished difference Result 445 states and 994 transitions. [2022-02-16 13:46:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:46:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:32,244 INFO L225 Difference]: With dead ends: 445 [2022-02-16 13:46:32,244 INFO L226 Difference]: Without dead ends: 390 [2022-02-16 13:46:32,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=580, Invalid=2176, Unknown=0, NotChecked=0, Total=2756 [2022-02-16 13:46:32,245 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 485 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:32,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 283 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:46:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-16 13:46:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 202. [2022-02-16 13:46:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.9353233830845773) internal successors, (590), 201 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 590 transitions. [2022-02-16 13:46:32,250 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 590 transitions. Word has length 19 [2022-02-16 13:46:32,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:32,250 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 590 transitions. [2022-02-16 13:46:32,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 590 transitions. [2022-02-16 13:46:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:32,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:32,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:32,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-02-16 13:46:32,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-16 13:46:32,467 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:32,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1036088529, now seen corresponding path program 11 times [2022-02-16 13:46:32,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:32,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375210431] [2022-02-16 13:46:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:32,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:32,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:32,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375210431] [2022-02-16 13:46:32,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375210431] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:32,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245507842] [2022-02-16 13:46:32,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:46:32,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:32,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:32,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:32,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 13:46:32,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:46:32,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:32,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2022-02-16 13:46:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:33,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:33,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:33,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 125 [2022-02-16 13:46:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:33,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245507842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:33,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:33,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:33,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340714456] [2022-02-16 13:46:33,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:33,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:33,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:33,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:33,718 INFO L87 Difference]: Start difference. First operand 202 states and 590 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:34,692 INFO L93 Difference]: Finished difference Result 337 states and 824 transitions. [2022-02-16 13:46:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 13:46:34,692 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:34,693 INFO L225 Difference]: With dead ends: 337 [2022-02-16 13:46:34,693 INFO L226 Difference]: Without dead ends: 308 [2022-02-16 13:46:34,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 13:46:34,694 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 214 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:34,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 250 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:46:34,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-16 13:46:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 214. [2022-02-16 13:46:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.887323943661972) internal successors, (615), 213 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 615 transitions. [2022-02-16 13:46:34,698 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 615 transitions. Word has length 19 [2022-02-16 13:46:34,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:34,700 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 615 transitions. [2022-02-16 13:46:34,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:34,700 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 615 transitions. [2022-02-16 13:46:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:34,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:34,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:34,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:34,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-16 13:46:34,915 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash 611890995, now seen corresponding path program 12 times [2022-02-16 13:46:34,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:34,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832231867] [2022-02-16 13:46:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:34,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:34,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:34,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832231867] [2022-02-16 13:46:34,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832231867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:34,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179296620] [2022-02-16 13:46:34,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:46:34,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:34,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:35,004 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:35,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 13:46:35,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:46:35,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:35,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-16 13:46:35,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:35,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 142 [2022-02-16 13:46:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:35,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:35,881 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:46:35,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 95 [2022-02-16 13:46:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:35,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179296620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:35,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:35,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-16 13:46:35,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718390515] [2022-02-16 13:46:35,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:35,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:46:35,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:35,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:46:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:46:35,941 INFO L87 Difference]: Start difference. First operand 214 states and 615 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:36,813 INFO L93 Difference]: Finished difference Result 465 states and 1132 transitions. [2022-02-16 13:46:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:46:36,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:36,814 INFO L225 Difference]: With dead ends: 465 [2022-02-16 13:46:36,814 INFO L226 Difference]: Without dead ends: 430 [2022-02-16 13:46:36,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:46:36,815 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 290 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:36,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 107 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:46:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-02-16 13:46:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 230. [2022-02-16 13:46:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.017467248908297) internal successors, (691), 229 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 691 transitions. [2022-02-16 13:46:36,820 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 691 transitions. Word has length 19 [2022-02-16 13:46:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:36,820 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 691 transitions. [2022-02-16 13:46:36,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 691 transitions. [2022-02-16 13:46:36,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:36,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:36,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:36,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-16 13:46:37,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-16 13:46:37,039 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash -544162377, now seen corresponding path program 13 times [2022-02-16 13:46:37,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:37,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056280615] [2022-02-16 13:46:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:37,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:37,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:37,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056280615] [2022-02-16 13:46:37,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056280615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:37,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222795137] [2022-02-16 13:46:37,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:46:37,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:37,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:37,184 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:37,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 13:46:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:37,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:37,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:46:37,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2022-02-16 13:46:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:37,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:38,174 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:46:38,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 119 [2022-02-16 13:46:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:38,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222795137] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:38,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:38,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-16 13:46:38,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058172223] [2022-02-16 13:46:38,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:38,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-16 13:46:38,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-16 13:46:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:46:38,227 INFO L87 Difference]: Start difference. First operand 230 states and 691 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:39,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:39,135 INFO L93 Difference]: Finished difference Result 328 states and 957 transitions. [2022-02-16 13:46:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 13:46:39,136 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:39,137 INFO L225 Difference]: With dead ends: 328 [2022-02-16 13:46:39,137 INFO L226 Difference]: Without dead ends: 307 [2022-02-16 13:46:39,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2022-02-16 13:46:39,138 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:39,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 143 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 527 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-02-16 13:46:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-16 13:46:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 239. [2022-02-16 13:46:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 3.042016806722689) internal successors, (724), 238 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 724 transitions. [2022-02-16 13:46:39,143 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 724 transitions. Word has length 19 [2022-02-16 13:46:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:39,143 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 724 transitions. [2022-02-16 13:46:39,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 724 transitions. [2022-02-16 13:46:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:39,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:39,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:39,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-16 13:46:39,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-16 13:46:39,365 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:39,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1560285095, now seen corresponding path program 14 times [2022-02-16 13:46:39,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:39,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962316888] [2022-02-16 13:46:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:39,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:39,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:39,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962316888] [2022-02-16 13:46:39,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962316888] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:39,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179693957] [2022-02-16 13:46:39,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:46:39,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:39,485 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:39,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 13:46:39,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:46:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:39,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:46:39,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:39,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 143 [2022-02-16 13:46:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:40,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:40,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:40,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 131 [2022-02-16 13:46:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:40,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179693957] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:40,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:40,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:40,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717388343] [2022-02-16 13:46:40,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:40,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:40,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:40,870 INFO L87 Difference]: Start difference. First operand 239 states and 724 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:44,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:44,591 INFO L93 Difference]: Finished difference Result 591 states and 1439 transitions. [2022-02-16 13:46:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 13:46:44,596 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:44,597 INFO L225 Difference]: With dead ends: 591 [2022-02-16 13:46:44,597 INFO L226 Difference]: Without dead ends: 570 [2022-02-16 13:46:44,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=716, Invalid=3444, Unknown=0, NotChecked=0, Total=4160 [2022-02-16 13:46:44,599 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 407 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:44,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 235 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:46:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-16 13:46:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 253. [2022-02-16 13:46:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.0277777777777777) internal successors, (763), 252 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2022-02-16 13:46:44,622 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 19 [2022-02-16 13:46:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:44,623 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2022-02-16 13:46:44,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2022-02-16 13:46:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:44,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:44,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:44,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:44,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:44,824 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1753092147, now seen corresponding path program 15 times [2022-02-16 13:46:44,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:44,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483506027] [2022-02-16 13:46:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:44,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:44,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:44,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483506027] [2022-02-16 13:46:44,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483506027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:44,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040883491] [2022-02-16 13:46:44,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:46:44,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:44,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:44,995 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:44,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 13:46:45,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:46:45,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:45,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:45,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:45,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 128 [2022-02-16 13:46:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:45,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:46,193 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:46:46,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 89 [2022-02-16 13:46:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:46,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040883491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:46,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:46,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:46,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243831302] [2022-02-16 13:46:46,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:46,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:46,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:46,248 INFO L87 Difference]: Start difference. First operand 253 states and 763 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:47,524 INFO L93 Difference]: Finished difference Result 379 states and 996 transitions. [2022-02-16 13:46:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 13:46:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:47,525 INFO L225 Difference]: With dead ends: 379 [2022-02-16 13:46:47,526 INFO L226 Difference]: Without dead ends: 365 [2022-02-16 13:46:47,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:46:47,526 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 162 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:47,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 138 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:46:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-16 13:46:47,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 257. [2022-02-16 13:46:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.01171875) internal successors, (771), 256 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 771 transitions. [2022-02-16 13:46:47,532 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 771 transitions. Word has length 19 [2022-02-16 13:46:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:47,532 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 771 transitions. [2022-02-16 13:46:47,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 771 transitions. [2022-02-16 13:46:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:47,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:47,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:47,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:47,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-16 13:46:47,749 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1262400619, now seen corresponding path program 16 times [2022-02-16 13:46:47,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:47,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612393214] [2022-02-16 13:46:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:47,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:47,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:47,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612393214] [2022-02-16 13:46:47,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612393214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:47,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172321068] [2022-02-16 13:46:47,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:46:47,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:47,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:47,899 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:47,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 13:46:47,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:46:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:47,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:48,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 130 [2022-02-16 13:46:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:48,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:49,308 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:46:49,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 89 [2022-02-16 13:46:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:49,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172321068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:49,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:49,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:49,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313207413] [2022-02-16 13:46:49,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:49,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:49,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:49,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:49,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:49,369 INFO L87 Difference]: Start difference. First operand 257 states and 771 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:51,600 INFO L93 Difference]: Finished difference Result 387 states and 1014 transitions. [2022-02-16 13:46:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 13:46:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:51,602 INFO L225 Difference]: With dead ends: 387 [2022-02-16 13:46:51,602 INFO L226 Difference]: Without dead ends: 381 [2022-02-16 13:46:51,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 13:46:51,603 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 144 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:51,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 198 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:46:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-02-16 13:46:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 259. [2022-02-16 13:46:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.011627906976744) internal successors, (777), 258 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 777 transitions. [2022-02-16 13:46:51,608 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 777 transitions. Word has length 19 [2022-02-16 13:46:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:51,608 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 777 transitions. [2022-02-16 13:46:51,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 777 transitions. [2022-02-16 13:46:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:51,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:51,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:51,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 13:46:51,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-16 13:46:51,823 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:51,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1817096085, now seen corresponding path program 17 times [2022-02-16 13:46:51,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:51,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270237567] [2022-02-16 13:46:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:51,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:51,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:51,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270237567] [2022-02-16 13:46:51,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270237567] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:51,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82315827] [2022-02-16 13:46:51,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:46:51,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:51,964 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:51,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 13:46:52,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:46:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 13:46:52,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:52,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 122 [2022-02-16 13:46:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:52,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:53,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:46:53,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-02-16 13:46:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:53,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82315827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:53,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:53,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:53,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157249125] [2022-02-16 13:46:53,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:53,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:53,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:53,267 INFO L87 Difference]: Start difference. First operand 259 states and 777 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:57,006 INFO L93 Difference]: Finished difference Result 614 states and 1449 transitions. [2022-02-16 13:46:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-16 13:46:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:57,008 INFO L225 Difference]: With dead ends: 614 [2022-02-16 13:46:57,008 INFO L226 Difference]: Without dead ends: 588 [2022-02-16 13:46:57,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=900, Invalid=3006, Unknown=0, NotChecked=0, Total=3906 [2022-02-16 13:46:57,009 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 470 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:57,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 233 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:46:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-16 13:46:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 264. [2022-02-16 13:46:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2022-02-16 13:46:57,015 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 19 [2022-02-16 13:46:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:57,015 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2022-02-16 13:46:57,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2022-02-16 13:46:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:57,015 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:57,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:57,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-16 13:46:57,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:57,228 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1027719147, now seen corresponding path program 18 times [2022-02-16 13:46:57,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:57,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493775879] [2022-02-16 13:46:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:57,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:46:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:46:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:57,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:46:57,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493775879] [2022-02-16 13:46:57,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493775879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:46:57,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368277791] [2022-02-16 13:46:57,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:46:57,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:57,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:46:57,351 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:46:57,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 13:46:57,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:46:57,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:46:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:46:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:46:57,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 115 [2022-02-16 13:46:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:57,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:46:58,326 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:46:58,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 119 [2022-02-16 13:46:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:46:58,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368277791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:46:58,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:46:58,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:46:58,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884278512] [2022-02-16 13:46:58,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:46:58,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:46:58,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:46:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:46:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:46:58,364 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:46:59,769 INFO L93 Difference]: Finished difference Result 477 states and 1261 transitions. [2022-02-16 13:46:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 13:46:59,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:46:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:46:59,770 INFO L225 Difference]: With dead ends: 477 [2022-02-16 13:46:59,770 INFO L226 Difference]: Without dead ends: 472 [2022-02-16 13:46:59,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 13:46:59,775 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 227 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:46:59,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 216 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:46:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-02-16 13:46:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 269. [2022-02-16 13:46:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.9813432835820897) internal successors, (799), 268 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 799 transitions. [2022-02-16 13:46:59,782 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 799 transitions. Word has length 19 [2022-02-16 13:46:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:46:59,783 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 799 transitions. [2022-02-16 13:46:59,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:46:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 799 transitions. [2022-02-16 13:46:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:46:59,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:46:59,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:46:59,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-16 13:46:59,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:46:59,997 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:46:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:46:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash 832286319, now seen corresponding path program 19 times [2022-02-16 13:46:59,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:46:59,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751686402] [2022-02-16 13:46:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:46:59,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:00,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:00,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751686402] [2022-02-16 13:47:00,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751686402] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:00,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270150379] [2022-02-16 13:47:00,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:00,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:00,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:00,119 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:00,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 13:47:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:47:00,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:00,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 115 [2022-02-16 13:47:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:00,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:01,017 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:01,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 125 [2022-02-16 13:47:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:01,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270150379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:01,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:01,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:47:01,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096015605] [2022-02-16 13:47:01,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:01,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:47:01,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:47:01,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:01,079 INFO L87 Difference]: Start difference. First operand 269 states and 799 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:04,357 INFO L93 Difference]: Finished difference Result 714 states and 1622 transitions. [2022-02-16 13:47:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-16 13:47:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:47:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:04,358 INFO L225 Difference]: With dead ends: 714 [2022-02-16 13:47:04,358 INFO L226 Difference]: Without dead ends: 656 [2022-02-16 13:47:04,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=917, Invalid=3373, Unknown=0, NotChecked=0, Total=4290 [2022-02-16 13:47:04,360 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 546 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:04,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 301 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:47:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-02-16 13:47:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 283. [2022-02-16 13:47:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9680851063829787) internal successors, (837), 282 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 837 transitions. [2022-02-16 13:47:04,366 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 837 transitions. Word has length 19 [2022-02-16 13:47:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 837 transitions. [2022-02-16 13:47:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 837 transitions. [2022-02-16 13:47:04,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:47:04,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:04,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:04,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:04,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:04,584 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:04,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1925692831, now seen corresponding path program 20 times [2022-02-16 13:47:04,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:04,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893798771] [2022-02-16 13:47:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:04,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:04,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:04,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893798771] [2022-02-16 13:47:04,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893798771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:04,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338461994] [2022-02-16 13:47:04,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:04,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:04,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:04,728 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:04,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 13:47:04,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:04,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:04,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:47:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:05,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2022-02-16 13:47:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:05,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:05,904 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:05,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 119 [2022-02-16 13:47:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:05,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338461994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:05,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:05,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:47:05,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999704699] [2022-02-16 13:47:05,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:05,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:47:05,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:05,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:47:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:05,962 INFO L87 Difference]: Start difference. First operand 283 states and 837 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:07,663 INFO L93 Difference]: Finished difference Result 474 states and 1249 transitions. [2022-02-16 13:47:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 13:47:07,663 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:47:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:07,665 INFO L225 Difference]: With dead ends: 474 [2022-02-16 13:47:07,665 INFO L226 Difference]: Without dead ends: 466 [2022-02-16 13:47:07,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 13:47:07,666 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:07,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 191 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:47:07,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-02-16 13:47:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 285. [2022-02-16 13:47:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.961267605633803) internal successors, (841), 284 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 841 transitions. [2022-02-16 13:47:07,678 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 841 transitions. Word has length 19 [2022-02-16 13:47:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:07,678 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 841 transitions. [2022-02-16 13:47:07,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 841 transitions. [2022-02-16 13:47:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:47:07,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:07,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:07,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-02-16 13:47:07,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-16 13:47:07,894 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:07,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1163605777, now seen corresponding path program 21 times [2022-02-16 13:47:07,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:07,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456525580] [2022-02-16 13:47:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:07,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:08,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:08,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456525580] [2022-02-16 13:47:08,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456525580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:08,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716097495] [2022-02-16 13:47:08,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:08,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:08,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:08,056 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:08,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 13:47:08,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:47:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:08,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:47:08,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:08,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 88 [2022-02-16 13:47:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:08,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:08,889 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:08,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 95 [2022-02-16 13:47:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:08,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716097495] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:08,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:08,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:47:08,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990290630] [2022-02-16 13:47:08,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:08,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:47:08,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:47:08,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:08,967 INFO L87 Difference]: Start difference. First operand 285 states and 841 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:12,571 INFO L93 Difference]: Finished difference Result 591 states and 1439 transitions. [2022-02-16 13:47:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 13:47:12,572 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:47:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:12,573 INFO L225 Difference]: With dead ends: 591 [2022-02-16 13:47:12,573 INFO L226 Difference]: Without dead ends: 456 [2022-02-16 13:47:12,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=920, Invalid=3112, Unknown=0, NotChecked=0, Total=4032 [2022-02-16 13:47:12,575 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 352 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:12,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 310 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 13:47:12,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-02-16 13:47:12,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 261. [2022-02-16 13:47:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.976923076923077) internal successors, (774), 260 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 774 transitions. [2022-02-16 13:47:12,583 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 774 transitions. Word has length 19 [2022-02-16 13:47:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:12,583 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 774 transitions. [2022-02-16 13:47:12,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 774 transitions. [2022-02-16 13:47:12,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:47:12,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:12,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:12,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:12,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-16 13:47:12,795 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash -624910459, now seen corresponding path program 22 times [2022-02-16 13:47:12,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:12,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570417945] [2022-02-16 13:47:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:12,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:12,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:12,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570417945] [2022-02-16 13:47:12,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570417945] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:12,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426478199] [2022-02-16 13:47:12,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:12,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:12,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:12,954 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:12,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 13:47:13,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:13,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-16 13:47:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:13,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 124 [2022-02-16 13:47:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:13,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:13,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:47:13,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 84 [2022-02-16 13:47:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:14,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426478199] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:14,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:14,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-16 13:47:14,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278452955] [2022-02-16 13:47:14,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:14,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 13:47:14,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 13:47:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:14,098 INFO L87 Difference]: Start difference. First operand 261 states and 774 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:15,131 INFO L93 Difference]: Finished difference Result 411 states and 1125 transitions. [2022-02-16 13:47:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 13:47:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:47:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:15,133 INFO L225 Difference]: With dead ends: 411 [2022-02-16 13:47:15,133 INFO L226 Difference]: Without dead ends: 403 [2022-02-16 13:47:15,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 13:47:15,134 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 136 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:15,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 180 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:47:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-16 13:47:15,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 265. [2022-02-16 13:47:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.9886363636363638) internal successors, (789), 264 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 789 transitions. [2022-02-16 13:47:15,139 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 789 transitions. Word has length 19 [2022-02-16 13:47:15,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:15,139 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 789 transitions. [2022-02-16 13:47:15,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 789 transitions. [2022-02-16 13:47:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 13:47:15,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:15,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:15,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:15,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:15,356 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:15,356 INFO L85 PathProgramCache]: Analyzing trace with hash -711222179, now seen corresponding path program 23 times [2022-02-16 13:47:15,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:15,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655358303] [2022-02-16 13:47:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:15,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:15,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:15,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655358303] [2022-02-16 13:47:15,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655358303] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:15,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784261880] [2022-02-16 13:47:15,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:15,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:15,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:15,478 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:15,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 13:47:15,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:15,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:15,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-16 13:47:15,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:15,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 98 [2022-02-16 13:47:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:16,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:16,377 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:16,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 125 [2022-02-16 13:47:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:16,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784261880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:16,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:16,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-16 13:47:16,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808646911] [2022-02-16 13:47:16,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:16,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:16,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:16,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:16,436 INFO L87 Difference]: Start difference. First operand 265 states and 789 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:20,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:20,099 INFO L93 Difference]: Finished difference Result 768 states and 1762 transitions. [2022-02-16 13:47:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-16 13:47:20,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-16 13:47:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:20,101 INFO L225 Difference]: With dead ends: 768 [2022-02-16 13:47:20,101 INFO L226 Difference]: Without dead ends: 642 [2022-02-16 13:47:20,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=868, Invalid=3688, Unknown=0, NotChecked=0, Total=4556 [2022-02-16 13:47:20,102 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 274 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:20,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 436 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 13:47:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-16 13:47:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 268. [2022-02-16 13:47:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.8876404494382024) internal successors, (771), 267 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 771 transitions. [2022-02-16 13:47:20,108 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 771 transitions. Word has length 19 [2022-02-16 13:47:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:20,108 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 771 transitions. [2022-02-16 13:47:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 771 transitions. [2022-02-16 13:47:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:20,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:20,109 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:20,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:20,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:20,323 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1808508414, now seen corresponding path program 24 times [2022-02-16 13:47:20,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:20,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029312917] [2022-02-16 13:47:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:20,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:20,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:20,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029312917] [2022-02-16 13:47:20,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029312917] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:20,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807761986] [2022-02-16 13:47:20,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:47:20,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:20,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:20,420 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:20,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 13:47:20,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:47:20,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:20,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:20,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:20,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:20,662 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:20,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:20,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807761986] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:20,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:20,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:47:20,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647398726] [2022-02-16 13:47:20,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:20,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:47:20,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:47:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:47:20,679 INFO L87 Difference]: Start difference. First operand 268 states and 771 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:20,932 INFO L93 Difference]: Finished difference Result 377 states and 972 transitions. [2022-02-16 13:47:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:20,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:20,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:20,933 INFO L225 Difference]: With dead ends: 377 [2022-02-16 13:47:20,933 INFO L226 Difference]: Without dead ends: 377 [2022-02-16 13:47:20,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:20,933 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 141 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:20,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 92 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-16 13:47:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 272. [2022-02-16 13:47:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.8819188191881917) internal successors, (781), 271 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 781 transitions. [2022-02-16 13:47:20,938 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 781 transitions. Word has length 20 [2022-02-16 13:47:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:20,938 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 781 transitions. [2022-02-16 13:47:20,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 781 transitions. [2022-02-16 13:47:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:20,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:20,939 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:20,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:21,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-16 13:47:21,155 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash 973779266, now seen corresponding path program 25 times [2022-02-16 13:47:21,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:21,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424765390] [2022-02-16 13:47:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:21,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:21,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:21,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424765390] [2022-02-16 13:47:21,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424765390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:21,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538313056] [2022-02-16 13:47:21,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:21,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:21,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:21,246 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:21,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 13:47:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:21,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:21,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:21,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:21,469 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:21,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:21,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538313056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:21,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:21,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:47:21,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816564689] [2022-02-16 13:47:21,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:21,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:47:21,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:21,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:47:21,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:47:21,484 INFO L87 Difference]: Start difference. First operand 272 states and 781 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:21,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:21,716 INFO L93 Difference]: Finished difference Result 394 states and 995 transitions. [2022-02-16 13:47:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:21,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:21,730 INFO L225 Difference]: With dead ends: 394 [2022-02-16 13:47:21,730 INFO L226 Difference]: Without dead ends: 394 [2022-02-16 13:47:21,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:21,731 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 208 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:21,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 84 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:21,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-02-16 13:47:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 273. [2022-02-16 13:47:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.8823529411764706) internal successors, (784), 272 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 784 transitions. [2022-02-16 13:47:21,735 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 784 transitions. Word has length 20 [2022-02-16 13:47:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:21,736 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 784 transitions. [2022-02-16 13:47:21,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 784 transitions. [2022-02-16 13:47:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:21,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:21,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:21,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:21,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-16 13:47:21,952 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1688312122, now seen corresponding path program 26 times [2022-02-16 13:47:21,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:21,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888529638] [2022-02-16 13:47:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:21,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:22,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:22,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888529638] [2022-02-16 13:47:22,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888529638] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:22,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494527475] [2022-02-16 13:47:22,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:22,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:22,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:22,011 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:22,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 13:47:22,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:22,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:22,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:22,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:22,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:22,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:22,234 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:22,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:22,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494527475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:22,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:22,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:47:22,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016060873] [2022-02-16 13:47:22,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:22,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:47:22,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:47:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:47:22,248 INFO L87 Difference]: Start difference. First operand 273 states and 784 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:22,469 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2022-02-16 13:47:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:22,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:22,470 INFO L225 Difference]: With dead ends: 379 [2022-02-16 13:47:22,470 INFO L226 Difference]: Without dead ends: 378 [2022-02-16 13:47:22,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:47:22,470 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 125 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:22,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 81 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-02-16 13:47:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 273. [2022-02-16 13:47:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.8786764705882355) internal successors, (783), 272 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 783 transitions. [2022-02-16 13:47:22,474 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 783 transitions. Word has length 20 [2022-02-16 13:47:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:22,474 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 783 transitions. [2022-02-16 13:47:22,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 783 transitions. [2022-02-16 13:47:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:22,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:22,475 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:22,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:22,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-16 13:47:22,692 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1838053092, now seen corresponding path program 27 times [2022-02-16 13:47:22,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:22,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654840964] [2022-02-16 13:47:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:22,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:22,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:22,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654840964] [2022-02-16 13:47:22,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654840964] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:22,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438871087] [2022-02-16 13:47:22,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:22,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:22,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:22,777 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:22,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 13:47:22,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:47:22,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:22,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:22,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:22,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:47:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:22,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:23,089 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:23,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:23,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438871087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:23,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:23,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:23,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741846891] [2022-02-16 13:47:23,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:23,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:23,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:23,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:23,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:23,105 INFO L87 Difference]: Start difference. First operand 273 states and 783 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:23,413 INFO L93 Difference]: Finished difference Result 376 states and 972 transitions. [2022-02-16 13:47:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:23,413 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:23,414 INFO L225 Difference]: With dead ends: 376 [2022-02-16 13:47:23,414 INFO L226 Difference]: Without dead ends: 376 [2022-02-16 13:47:23,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:23,414 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 131 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:23,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 95 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-16 13:47:23,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 275. [2022-02-16 13:47:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.8795620437956204) internal successors, (789), 274 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 789 transitions. [2022-02-16 13:47:23,419 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 789 transitions. Word has length 20 [2022-02-16 13:47:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:23,419 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 789 transitions. [2022-02-16 13:47:23,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 789 transitions. [2022-02-16 13:47:23,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:23,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:23,419 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:23,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-16 13:47:23,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-16 13:47:23,631 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:23,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1123520236, now seen corresponding path program 28 times [2022-02-16 13:47:23,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:23,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393062320] [2022-02-16 13:47:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:23,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:23,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:23,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393062320] [2022-02-16 13:47:23,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393062320] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:23,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639233632] [2022-02-16 13:47:23,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:23,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:23,719 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:23,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 13:47:23,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:23,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:23,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:23,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:47:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:23,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:24,058 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:24,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:24,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639233632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:24,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:24,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:47:24,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406573897] [2022-02-16 13:47:24,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:24,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:47:24,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:47:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:47:24,076 INFO L87 Difference]: Start difference. First operand 275 states and 789 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:24,467 INFO L93 Difference]: Finished difference Result 377 states and 972 transitions. [2022-02-16 13:47:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:47:24,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:24,468 INFO L225 Difference]: With dead ends: 377 [2022-02-16 13:47:24,468 INFO L226 Difference]: Without dead ends: 376 [2022-02-16 13:47:24,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:24,469 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 135 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:24,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 95 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-16 13:47:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 274. [2022-02-16 13:47:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.879120879120879) internal successors, (786), 273 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 786 transitions. [2022-02-16 13:47:24,473 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 786 transitions. Word has length 20 [2022-02-16 13:47:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:24,473 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 786 transitions. [2022-02-16 13:47:24,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 786 transitions. [2022-02-16 13:47:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:24,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:24,474 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:24,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:24,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:24,690 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -535774914, now seen corresponding path program 29 times [2022-02-16 13:47:24,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:24,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417367410] [2022-02-16 13:47:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:24,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:24,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:24,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417367410] [2022-02-16 13:47:24,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417367410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:24,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309855492] [2022-02-16 13:47:24,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:24,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:24,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:24,788 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:24,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 13:47:24,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:24,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:25,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:25,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:25,192 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:25,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:25,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309855492] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:25,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:25,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:47:25,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701903817] [2022-02-16 13:47:25,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:25,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:47:25,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:25,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:47:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:47:25,216 INFO L87 Difference]: Start difference. First operand 274 states and 786 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:25,620 INFO L93 Difference]: Finished difference Result 363 states and 954 transitions. [2022-02-16 13:47:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:25,621 INFO L225 Difference]: With dead ends: 363 [2022-02-16 13:47:25,621 INFO L226 Difference]: Without dead ends: 361 [2022-02-16 13:47:25,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:25,622 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:25,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 84 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-16 13:47:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 274. [2022-02-16 13:47:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.8754578754578755) internal successors, (785), 273 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 785 transitions. [2022-02-16 13:47:25,626 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 785 transitions. Word has length 20 [2022-02-16 13:47:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:25,626 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 785 transitions. [2022-02-16 13:47:25,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 785 transitions. [2022-02-16 13:47:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:25,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:25,627 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:25,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-16 13:47:25,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:25,841 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:25,841 INFO L85 PathProgramCache]: Analyzing trace with hash 766971300, now seen corresponding path program 30 times [2022-02-16 13:47:25,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:25,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654359975] [2022-02-16 13:47:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:25,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:25,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:25,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654359975] [2022-02-16 13:47:25,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654359975] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:25,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743073254] [2022-02-16 13:47:25,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:47:25,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:25,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:25,943 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:25,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 13:47:25,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:47:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:26,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:47:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:26,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:26,413 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:26,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:26,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743073254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:26,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:26,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:26,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503874746] [2022-02-16 13:47:26,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:26,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:26,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:26,436 INFO L87 Difference]: Start difference. First operand 274 states and 785 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:26,885 INFO L93 Difference]: Finished difference Result 394 states and 999 transitions. [2022-02-16 13:47:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:26,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:26,886 INFO L225 Difference]: With dead ends: 394 [2022-02-16 13:47:26,886 INFO L226 Difference]: Without dead ends: 394 [2022-02-16 13:47:26,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:26,886 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 198 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:26,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 111 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-02-16 13:47:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 277. [2022-02-16 13:47:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.8768115942028984) internal successors, (794), 276 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 794 transitions. [2022-02-16 13:47:26,891 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 794 transitions. Word has length 20 [2022-02-16 13:47:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:26,891 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 794 transitions. [2022-02-16 13:47:26,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 794 transitions. [2022-02-16 13:47:26,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:26,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:26,891 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:26,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:27,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-02-16 13:47:27,107 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1481504156, now seen corresponding path program 31 times [2022-02-16 13:47:27,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:27,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345681722] [2022-02-16 13:47:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:27,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:27,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:27,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345681722] [2022-02-16 13:47:27,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345681722] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:27,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743870723] [2022-02-16 13:47:27,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:27,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:27,185 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:27,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 13:47:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:27,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:27,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:27,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:47:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:27,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:27,568 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:27,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:27,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743870723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:27,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:27,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:47:27,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167746810] [2022-02-16 13:47:27,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:27,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:47:27,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:47:27,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:47:27,589 INFO L87 Difference]: Start difference. First operand 277 states and 794 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:27,846 INFO L93 Difference]: Finished difference Result 395 states and 999 transitions. [2022-02-16 13:47:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:47:27,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:27,847 INFO L225 Difference]: With dead ends: 395 [2022-02-16 13:47:27,847 INFO L226 Difference]: Without dead ends: 394 [2022-02-16 13:47:27,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:47:27,847 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 184 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:27,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 69 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-02-16 13:47:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 276. [2022-02-16 13:47:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.8763636363636365) internal successors, (791), 275 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 791 transitions. [2022-02-16 13:47:27,851 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 791 transitions. Word has length 20 [2022-02-16 13:47:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:27,852 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 791 transitions. [2022-02-16 13:47:27,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:27,852 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 791 transitions. [2022-02-16 13:47:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:27,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:27,852 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:27,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:28,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:28,069 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2069249478, now seen corresponding path program 32 times [2022-02-16 13:47:28,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:28,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762178720] [2022-02-16 13:47:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:28,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:28,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:28,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762178720] [2022-02-16 13:47:28,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762178720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:28,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733164345] [2022-02-16 13:47:28,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:28,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:28,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:28,129 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:28,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 13:47:28,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:28,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:28,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:28,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:28,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:28,429 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:28,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:28,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733164345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:28,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:28,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:47:28,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244242972] [2022-02-16 13:47:28,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:28,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:47:28,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:28,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:47:28,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:47:28,455 INFO L87 Difference]: Start difference. First operand 276 states and 791 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:28,709 INFO L93 Difference]: Finished difference Result 382 states and 982 transitions. [2022-02-16 13:47:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:28,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:28,710 INFO L225 Difference]: With dead ends: 382 [2022-02-16 13:47:28,710 INFO L226 Difference]: Without dead ends: 380 [2022-02-16 13:47:28,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:28,711 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 94 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:28,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 68 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-16 13:47:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 275. [2022-02-16 13:47:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.875912408759124) internal successors, (788), 274 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 788 transitions. [2022-02-16 13:47:28,736 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 788 transitions. Word has length 20 [2022-02-16 13:47:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:28,736 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 788 transitions. [2022-02-16 13:47:28,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 788 transitions. [2022-02-16 13:47:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:28,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:28,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:28,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:28,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:28,937 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:28,937 INFO L85 PathProgramCache]: Analyzing trace with hash 740552058, now seen corresponding path program 33 times [2022-02-16 13:47:28,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:28,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123888888] [2022-02-16 13:47:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:28,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:29,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:29,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123888888] [2022-02-16 13:47:29,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123888888] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:29,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417681266] [2022-02-16 13:47:29,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:29,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:29,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:29,001 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:29,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 13:47:29,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:47:29,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:29,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:29,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:29,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:29,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:29,212 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:29,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:29,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417681266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:29,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:29,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 13:47:29,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10040267] [2022-02-16 13:47:29,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:29,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:47:29,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:47:29,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:47:29,237 INFO L87 Difference]: Start difference. First operand 275 states and 788 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:29,407 INFO L93 Difference]: Finished difference Result 380 states and 978 transitions. [2022-02-16 13:47:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:29,407 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:29,408 INFO L225 Difference]: With dead ends: 380 [2022-02-16 13:47:29,408 INFO L226 Difference]: Without dead ends: 377 [2022-02-16 13:47:29,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:47:29,410 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:29,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 80 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-16 13:47:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 275. [2022-02-16 13:47:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.872262773722628) internal successors, (787), 274 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 787 transitions. [2022-02-16 13:47:29,430 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 787 transitions. Word has length 20 [2022-02-16 13:47:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:29,430 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 787 transitions. [2022-02-16 13:47:29,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 787 transitions. [2022-02-16 13:47:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:29,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:29,431 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:29,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:29,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-16 13:47:29,648 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash 196530465, now seen corresponding path program 34 times [2022-02-16 13:47:29,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:29,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977949181] [2022-02-16 13:47:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:29,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:29,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:29,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977949181] [2022-02-16 13:47:29,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977949181] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:29,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981837633] [2022-02-16 13:47:29,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:29,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:29,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:29,704 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:29,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 13:47:29,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:29,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:29,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:29,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:47:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:29,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:30,017 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:30,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:47:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:30,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981837633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:30,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:30,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-02-16 13:47:30,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091853941] [2022-02-16 13:47:30,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:30,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:47:30,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:30,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:47:30,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:47:30,024 INFO L87 Difference]: Start difference. First operand 275 states and 787 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:30,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:30,269 INFO L93 Difference]: Finished difference Result 407 states and 1053 transitions. [2022-02-16 13:47:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:30,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:30,270 INFO L225 Difference]: With dead ends: 407 [2022-02-16 13:47:30,270 INFO L226 Difference]: Without dead ends: 380 [2022-02-16 13:47:30,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:47:30,271 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 109 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:30,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 138 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-16 13:47:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 275. [2022-02-16 13:47:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.9124087591240877) internal successors, (798), 274 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 798 transitions. [2022-02-16 13:47:30,274 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 798 transitions. Word has length 20 [2022-02-16 13:47:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:30,274 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 798 transitions. [2022-02-16 13:47:30,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 798 transitions. [2022-02-16 13:47:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:30,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:30,275 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:30,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:30,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-16 13:47:30,483 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:30,484 INFO L85 PathProgramCache]: Analyzing trace with hash -954250494, now seen corresponding path program 35 times [2022-02-16 13:47:30,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:30,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32278735] [2022-02-16 13:47:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:30,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:30,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:30,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32278735] [2022-02-16 13:47:30,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32278735] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:30,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89209917] [2022-02-16 13:47:30,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:30,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:30,590 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:30,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 13:47:30,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:30,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:30,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:30,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:30,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:30,964 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:30,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:30,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89209917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:30,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:30,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:47:30,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524922687] [2022-02-16 13:47:30,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:30,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:47:30,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:30,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:47:30,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:47:30,989 INFO L87 Difference]: Start difference. First operand 275 states and 798 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:31,349 INFO L93 Difference]: Finished difference Result 403 states and 1038 transitions. [2022-02-16 13:47:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:31,350 INFO L225 Difference]: With dead ends: 403 [2022-02-16 13:47:31,350 INFO L226 Difference]: Without dead ends: 403 [2022-02-16 13:47:31,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:31,350 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:31,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 83 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-16 13:47:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 279. [2022-02-16 13:47:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.902877697841727) internal successors, (807), 278 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 807 transitions. [2022-02-16 13:47:31,354 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 807 transitions. Word has length 20 [2022-02-16 13:47:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:31,354 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 807 transitions. [2022-02-16 13:47:31,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 807 transitions. [2022-02-16 13:47:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:31,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:31,355 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:31,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-16 13:47:31,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-16 13:47:31,571 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1788979642, now seen corresponding path program 36 times [2022-02-16 13:47:31,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:31,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834384857] [2022-02-16 13:47:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:31,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:31,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:31,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834384857] [2022-02-16 13:47:31,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834384857] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:31,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884242378] [2022-02-16 13:47:31,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:47:31,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:31,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:31,692 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:31,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-16 13:47:31,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:47:31,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:31,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:31,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:32,115 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:32,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:32,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884242378] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:32,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:32,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:32,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609605668] [2022-02-16 13:47:32,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:32,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:32,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:32,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:32,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:32,148 INFO L87 Difference]: Start difference. First operand 279 states and 807 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:32,575 INFO L93 Difference]: Finished difference Result 420 states and 1061 transitions. [2022-02-16 13:47:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:32,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:32,576 INFO L225 Difference]: With dead ends: 420 [2022-02-16 13:47:32,576 INFO L226 Difference]: Without dead ends: 420 [2022-02-16 13:47:32,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:32,576 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 141 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:32,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 115 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:32,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-16 13:47:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 280. [2022-02-16 13:47:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.903225806451613) internal successors, (810), 279 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 810 transitions. [2022-02-16 13:47:32,580 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 810 transitions. Word has length 20 [2022-02-16 13:47:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:32,580 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 810 transitions. [2022-02-16 13:47:32,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 810 transitions. [2022-02-16 13:47:32,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:32,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:32,581 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:32,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:32,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:32,796 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1074446786, now seen corresponding path program 37 times [2022-02-16 13:47:32,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:32,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136083759] [2022-02-16 13:47:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:32,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:32,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:32,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136083759] [2022-02-16 13:47:32,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136083759] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:32,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636008951] [2022-02-16 13:47:32,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:32,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:32,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:32,895 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:32,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-16 13:47:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:32,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:33,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:33,199 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:33,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:33,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636008951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:33,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:33,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:47:33,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076011654] [2022-02-16 13:47:33,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:33,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:47:33,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:33,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:47:33,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:47:33,214 INFO L87 Difference]: Start difference. First operand 280 states and 810 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:33,503 INFO L93 Difference]: Finished difference Result 405 states and 1041 transitions. [2022-02-16 13:47:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:33,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:33,504 INFO L225 Difference]: With dead ends: 405 [2022-02-16 13:47:33,504 INFO L226 Difference]: Without dead ends: 404 [2022-02-16 13:47:33,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:33,504 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:33,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 92 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-16 13:47:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 278. [2022-02-16 13:47:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9061371841155235) internal successors, (805), 277 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:33,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 805 transitions. [2022-02-16 13:47:33,508 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 805 transitions. Word has length 20 [2022-02-16 13:47:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:33,508 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 805 transitions. [2022-02-16 13:47:33,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 805 transitions. [2022-02-16 13:47:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:33,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:33,509 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:33,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:33,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-16 13:47:33,725 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash -305844704, now seen corresponding path program 38 times [2022-02-16 13:47:33,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:33,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116097695] [2022-02-16 13:47:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:33,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:33,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:33,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116097695] [2022-02-16 13:47:33,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116097695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:33,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413403613] [2022-02-16 13:47:33,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:33,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:33,856 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:33,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-16 13:47:33,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:33,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:33,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:34,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:47:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:34,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:34,259 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:34,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:34,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413403613] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:34,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:34,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:47:34,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242748470] [2022-02-16 13:47:34,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:34,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:34,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:34,277 INFO L87 Difference]: Start difference. First operand 278 states and 805 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:34,671 INFO L93 Difference]: Finished difference Result 398 states and 1028 transitions. [2022-02-16 13:47:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:34,672 INFO L225 Difference]: With dead ends: 398 [2022-02-16 13:47:34,672 INFO L226 Difference]: Without dead ends: 398 [2022-02-16 13:47:34,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:47:34,673 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 123 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:34,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 94 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-16 13:47:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 280. [2022-02-16 13:47:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.9068100358422937) internal successors, (811), 279 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 811 transitions. [2022-02-16 13:47:34,677 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 811 transitions. Word has length 20 [2022-02-16 13:47:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:34,677 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 811 transitions. [2022-02-16 13:47:34,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 811 transitions. [2022-02-16 13:47:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:34,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:34,677 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:34,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:34,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-16 13:47:34,891 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:34,891 INFO L85 PathProgramCache]: Analyzing trace with hash 408688152, now seen corresponding path program 39 times [2022-02-16 13:47:34,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:34,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700410946] [2022-02-16 13:47:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:34,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:34,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:34,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700410946] [2022-02-16 13:47:34,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700410946] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:34,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2979692] [2022-02-16 13:47:34,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:34,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:34,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:34,978 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:34,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-16 13:47:35,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:47:35,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:35,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:47:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:35,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:35,329 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:35,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:35,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2979692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:35,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:35,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:35,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945015568] [2022-02-16 13:47:35,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:35,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:35,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:35,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:35,350 INFO L87 Difference]: Start difference. First operand 280 states and 811 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:35,742 INFO L93 Difference]: Finished difference Result 399 states and 1028 transitions. [2022-02-16 13:47:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:47:35,742 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:35,743 INFO L225 Difference]: With dead ends: 399 [2022-02-16 13:47:35,743 INFO L226 Difference]: Without dead ends: 398 [2022-02-16 13:47:35,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:47:35,743 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 101 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:35,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 107 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-16 13:47:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 279. [2022-02-16 13:47:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.906474820143885) internal successors, (808), 278 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 808 transitions. [2022-02-16 13:47:35,747 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 808 transitions. Word has length 20 [2022-02-16 13:47:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:35,747 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 808 transitions. [2022-02-16 13:47:35,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 808 transitions. [2022-02-16 13:47:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:35,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:35,747 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:35,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:35,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:35,963 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash 996433474, now seen corresponding path program 40 times [2022-02-16 13:47:35,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:35,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453111316] [2022-02-16 13:47:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:35,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:36,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:36,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453111316] [2022-02-16 13:47:36,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453111316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:36,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945944154] [2022-02-16 13:47:36,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:36,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:36,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:36,066 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:36,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-16 13:47:36,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:36,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:36,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:36,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:36,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:36,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:36,495 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:36,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:36,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945944154] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:36,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:36,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:36,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314086144] [2022-02-16 13:47:36,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:36,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:36,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:36,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:36,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:36,517 INFO L87 Difference]: Start difference. First operand 279 states and 808 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:36,996 INFO L93 Difference]: Finished difference Result 385 states and 1010 transitions. [2022-02-16 13:47:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:36,997 INFO L225 Difference]: With dead ends: 385 [2022-02-16 13:47:36,997 INFO L226 Difference]: Without dead ends: 383 [2022-02-16 13:47:36,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:36,997 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:36,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 102 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:36,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-16 13:47:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 277. [2022-02-16 13:47:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.9094202898550723) internal successors, (803), 276 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 803 transitions. [2022-02-16 13:47:37,001 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 803 transitions. Word has length 20 [2022-02-16 13:47:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:37,001 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 803 transitions. [2022-02-16 13:47:37,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 803 transitions. [2022-02-16 13:47:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:37,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:37,002 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:37,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:37,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-16 13:47:37,211 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:37,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1131168543, now seen corresponding path program 41 times [2022-02-16 13:47:37,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:37,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936946472] [2022-02-16 13:47:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:37,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:37,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:37,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936946472] [2022-02-16 13:47:37,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936946472] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:37,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588262039] [2022-02-16 13:47:37,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:37,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:37,276 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:37,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-16 13:47:37,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:37,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:37,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:37,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:37,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:47:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:37,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:37,638 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:37,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:47:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:37,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588262039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:37,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:37,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-02-16 13:47:37,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949370908] [2022-02-16 13:47:37,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:37,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:47:37,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:47:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:47:37,644 INFO L87 Difference]: Start difference. First operand 277 states and 803 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:37,869 INFO L93 Difference]: Finished difference Result 370 states and 1012 transitions. [2022-02-16 13:47:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:37,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:37,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:37,870 INFO L225 Difference]: With dead ends: 370 [2022-02-16 13:47:37,870 INFO L226 Difference]: Without dead ends: 343 [2022-02-16 13:47:37,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:37,870 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:37,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 117 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-16 13:47:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 280. [2022-02-16 13:47:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.924731182795699) internal successors, (816), 279 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 816 transitions. [2022-02-16 13:47:37,875 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 816 transitions. Word has length 20 [2022-02-16 13:47:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:37,876 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 816 transitions. [2022-02-16 13:47:37,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 816 transitions. [2022-02-16 13:47:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:37,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:37,877 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:37,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:38,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:38,077 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1647122878, now seen corresponding path program 42 times [2022-02-16 13:47:38,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:38,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478846779] [2022-02-16 13:47:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:38,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:38,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:38,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478846779] [2022-02-16 13:47:38,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478846779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:38,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872136704] [2022-02-16 13:47:38,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:47:38,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:38,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:38,177 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:38,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-16 13:47:38,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:47:38,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:38,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:38,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:38,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:47:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:38,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:38,507 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:38,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:38,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872136704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:38,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:38,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:47:38,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402760035] [2022-02-16 13:47:38,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:38,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:47:38,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:47:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:47:38,522 INFO L87 Difference]: Start difference. First operand 280 states and 816 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:38,814 INFO L93 Difference]: Finished difference Result 470 states and 1171 transitions. [2022-02-16 13:47:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:38,814 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:38,815 INFO L225 Difference]: With dead ends: 470 [2022-02-16 13:47:38,815 INFO L226 Difference]: Without dead ends: 470 [2022-02-16 13:47:38,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:38,815 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 175 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:38,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 98 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-02-16 13:47:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 286. [2022-02-16 13:47:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.92280701754386) internal successors, (833), 285 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 833 transitions. [2022-02-16 13:47:38,820 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 833 transitions. Word has length 20 [2022-02-16 13:47:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:38,820 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 833 transitions. [2022-02-16 13:47:38,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 833 transitions. [2022-02-16 13:47:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:38,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:38,820 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:38,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-16 13:47:39,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:39,029 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash 812393730, now seen corresponding path program 43 times [2022-02-16 13:47:39,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:39,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552825981] [2022-02-16 13:47:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:39,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:39,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:39,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552825981] [2022-02-16 13:47:39,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552825981] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:39,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102158127] [2022-02-16 13:47:39,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:39,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:39,167 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:39,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-16 13:47:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:39,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:39,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:39,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:47:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:39,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:39,666 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:39,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:39,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102158127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:39,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:39,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:39,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212474808] [2022-02-16 13:47:39,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:39,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:39,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:39,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:39,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:39,687 INFO L87 Difference]: Start difference. First operand 286 states and 833 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:40,063 INFO L93 Difference]: Finished difference Result 487 states and 1194 transitions. [2022-02-16 13:47:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:40,064 INFO L225 Difference]: With dead ends: 487 [2022-02-16 13:47:40,064 INFO L226 Difference]: Without dead ends: 487 [2022-02-16 13:47:40,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:40,066 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 246 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:40,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 137 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-02-16 13:47:40,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 288. [2022-02-16 13:47:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.926829268292683) internal successors, (840), 287 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 840 transitions. [2022-02-16 13:47:40,071 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 840 transitions. Word has length 20 [2022-02-16 13:47:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:40,071 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 840 transitions. [2022-02-16 13:47:40,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 840 transitions. [2022-02-16 13:47:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:40,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:40,072 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:40,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:40,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-16 13:47:40,287 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1526926586, now seen corresponding path program 44 times [2022-02-16 13:47:40,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:40,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659776193] [2022-02-16 13:47:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:40,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:40,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:40,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659776193] [2022-02-16 13:47:40,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659776193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:40,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636207124] [2022-02-16 13:47:40,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:40,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:40,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:40,370 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:40,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-16 13:47:40,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:40,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:40,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:40,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:40,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:40,629 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:40,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:40,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636207124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:40,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:40,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:47:40,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859264839] [2022-02-16 13:47:40,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:40,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:47:40,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:47:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:47:40,660 INFO L87 Difference]: Start difference. First operand 288 states and 840 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:40,950 INFO L93 Difference]: Finished difference Result 472 states and 1173 transitions. [2022-02-16 13:47:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:40,950 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:40,951 INFO L225 Difference]: With dead ends: 472 [2022-02-16 13:47:40,951 INFO L226 Difference]: Without dead ends: 471 [2022-02-16 13:47:40,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:47:40,952 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 213 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:40,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 123 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-02-16 13:47:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 287. [2022-02-16 13:47:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.923076923076923) internal successors, (836), 286 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 836 transitions. [2022-02-16 13:47:40,956 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 836 transitions. Word has length 20 [2022-02-16 13:47:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:40,957 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 836 transitions. [2022-02-16 13:47:40,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 836 transitions. [2022-02-16 13:47:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:40,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:40,957 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:40,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:41,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-16 13:47:41,172 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash 394489855, now seen corresponding path program 45 times [2022-02-16 13:47:41,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:41,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556826410] [2022-02-16 13:47:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:41,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:41,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:41,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556826410] [2022-02-16 13:47:41,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556826410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:41,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743605363] [2022-02-16 13:47:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:41,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:41,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:41,235 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:41,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-16 13:47:41,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:47:41,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:41,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:41,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:41,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:41,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:41,549 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:41,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:47:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:41,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743605363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:41,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:41,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-02-16 13:47:41,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262870041] [2022-02-16 13:47:41,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:41,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:47:41,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:41,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:47:41,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:47:41,553 INFO L87 Difference]: Start difference. First operand 287 states and 836 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:41,746 INFO L93 Difference]: Finished difference Result 405 states and 1080 transitions. [2022-02-16 13:47:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:41,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:41,747 INFO L225 Difference]: With dead ends: 405 [2022-02-16 13:47:41,747 INFO L226 Difference]: Without dead ends: 378 [2022-02-16 13:47:41,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:41,747 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:41,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 131 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-02-16 13:47:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 290. [2022-02-16 13:47:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9480968858131487) internal successors, (852), 289 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 852 transitions. [2022-02-16 13:47:41,751 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 852 transitions. Word has length 20 [2022-02-16 13:47:41,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:41,751 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 852 transitions. [2022-02-16 13:47:41,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 852 transitions. [2022-02-16 13:47:41,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:41,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:41,752 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:41,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:41,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-16 13:47:41,970 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:41,971 INFO L85 PathProgramCache]: Analyzing trace with hash -485719166, now seen corresponding path program 46 times [2022-02-16 13:47:41,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:41,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178992762] [2022-02-16 13:47:41,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:41,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:42,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:42,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178992762] [2022-02-16 13:47:42,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178992762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:42,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867001718] [2022-02-16 13:47:42,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:42,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:42,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:42,093 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:42,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-16 13:47:42,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:42,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:42,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:42,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:42,521 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:42,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:42,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867001718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:42,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:42,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:42,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334874063] [2022-02-16 13:47:42,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:42,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:42,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:42,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:42,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:42,547 INFO L87 Difference]: Start difference. First operand 290 states and 852 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:42,939 INFO L93 Difference]: Finished difference Result 458 states and 1154 transitions. [2022-02-16 13:47:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:42,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:42,940 INFO L225 Difference]: With dead ends: 458 [2022-02-16 13:47:42,940 INFO L226 Difference]: Without dead ends: 458 [2022-02-16 13:47:42,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:42,941 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 205 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:42,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 145 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-16 13:47:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 287. [2022-02-16 13:47:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.9510489510489513) internal successors, (844), 286 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 844 transitions. [2022-02-16 13:47:42,945 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 844 transitions. Word has length 20 [2022-02-16 13:47:42,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:42,945 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 844 transitions. [2022-02-16 13:47:42,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 844 transitions. [2022-02-16 13:47:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:42,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:42,945 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:42,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:43,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:43,161 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash -995495618, now seen corresponding path program 47 times [2022-02-16 13:47:43,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:43,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759622353] [2022-02-16 13:47:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:43,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:43,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:43,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759622353] [2022-02-16 13:47:43,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759622353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:43,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111517792] [2022-02-16 13:47:43,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:43,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:43,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:43,284 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:43,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-16 13:47:43,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:47:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:43,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:43,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:43,781 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:43,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:43,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111517792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:43,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:43,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:47:43,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677574959] [2022-02-16 13:47:43,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:43,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:43,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:43,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:43,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:43,804 INFO L87 Difference]: Start difference. First operand 287 states and 844 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:44,439 INFO L93 Difference]: Finished difference Result 475 states and 1183 transitions. [2022-02-16 13:47:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:47:44,439 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:44,440 INFO L225 Difference]: With dead ends: 475 [2022-02-16 13:47:44,440 INFO L226 Difference]: Without dead ends: 475 [2022-02-16 13:47:44,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:47:44,440 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 236 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:44,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 171 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:47:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-02-16 13:47:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 290. [2022-02-16 13:47:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9550173010380623) internal successors, (854), 289 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 854 transitions. [2022-02-16 13:47:44,445 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 854 transitions. Word has length 20 [2022-02-16 13:47:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:44,445 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 854 transitions. [2022-02-16 13:47:44,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 854 transitions. [2022-02-16 13:47:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:44,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:44,445 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:44,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:44,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-16 13:47:44,648 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1190928446, now seen corresponding path program 48 times [2022-02-16 13:47:44,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:44,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863470222] [2022-02-16 13:47:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:44,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:44,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:44,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863470222] [2022-02-16 13:47:44,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863470222] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:44,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032796934] [2022-02-16 13:47:44,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:47:44,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:44,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:44,788 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:44,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-16 13:47:44,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:47:44,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:44,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:44,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:44,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:45,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:45,283 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:45,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:45,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032796934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:45,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:45,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:47:45,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302949930] [2022-02-16 13:47:45,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:45,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:45,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:45,304 INFO L87 Difference]: Start difference. First operand 290 states and 854 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:46,014 INFO L93 Difference]: Finished difference Result 498 states and 1254 transitions. [2022-02-16 13:47:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 13:47:46,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:46,015 INFO L225 Difference]: With dead ends: 498 [2022-02-16 13:47:46,015 INFO L226 Difference]: Without dead ends: 498 [2022-02-16 13:47:46,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 13:47:46,016 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 175 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:46,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 193 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:47:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-16 13:47:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 297. [2022-02-16 13:47:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2022-02-16 13:47:46,020 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2022-02-16 13:47:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:46,020 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2022-02-16 13:47:46,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2022-02-16 13:47:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:46,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:46,021 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:46,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:46,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-16 13:47:46,236 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash -761563517, now seen corresponding path program 49 times [2022-02-16 13:47:46,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:46,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087233720] [2022-02-16 13:47:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:46,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:46,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:46,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087233720] [2022-02-16 13:47:46,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087233720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:46,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211805933] [2022-02-16 13:47:46,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:46,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:46,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:46,299 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:46,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-16 13:47:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:46,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:46,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:46,599 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:46,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:47:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:46,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211805933] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:46,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:46,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-02-16 13:47:46,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091654056] [2022-02-16 13:47:46,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:46,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:47:46,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:46,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:47:46,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:47:46,604 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:46,850 INFO L93 Difference]: Finished difference Result 367 states and 1010 transitions. [2022-02-16 13:47:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:46,851 INFO L225 Difference]: With dead ends: 367 [2022-02-16 13:47:46,851 INFO L226 Difference]: Without dead ends: 331 [2022-02-16 13:47:46,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:46,851 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:46,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 98 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-16 13:47:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 288. [2022-02-16 13:47:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.912891986062718) internal successors, (836), 287 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 836 transitions. [2022-02-16 13:47:46,855 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 836 transitions. Word has length 20 [2022-02-16 13:47:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:46,855 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 836 transitions. [2022-02-16 13:47:46,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 836 transitions. [2022-02-16 13:47:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:46,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:46,856 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:46,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:47,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:47,073 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1104770554, now seen corresponding path program 50 times [2022-02-16 13:47:47,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:47,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175614235] [2022-02-16 13:47:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:47,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:47,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:47,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175614235] [2022-02-16 13:47:47,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175614235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:47,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533235001] [2022-02-16 13:47:47,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:47,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:47,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:47,210 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:47,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-16 13:47:47,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:47,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:47,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:47,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:47,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:47,719 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:47,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:47,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533235001] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:47,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:47,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:47:47,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261613783] [2022-02-16 13:47:47,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:47,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:47,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:47,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:47,742 INFO L87 Difference]: Start difference. First operand 288 states and 836 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:48,370 INFO L93 Difference]: Finished difference Result 552 states and 1354 transitions. [2022-02-16 13:47:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:47:48,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:48,371 INFO L225 Difference]: With dead ends: 552 [2022-02-16 13:47:48,371 INFO L226 Difference]: Without dead ends: 552 [2022-02-16 13:47:48,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:47:48,372 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 258 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:48,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 147 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-02-16 13:47:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 295. [2022-02-16 13:47:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.931972789115646) internal successors, (862), 294 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 862 transitions. [2022-02-16 13:47:48,376 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 862 transitions. Word has length 20 [2022-02-16 13:47:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:48,376 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 862 transitions. [2022-02-16 13:47:48,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 862 transitions. [2022-02-16 13:47:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:48,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:48,377 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:48,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-16 13:47:48,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-16 13:47:48,588 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:48,588 INFO L85 PathProgramCache]: Analyzing trace with hash -390237698, now seen corresponding path program 51 times [2022-02-16 13:47:48,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:48,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032789782] [2022-02-16 13:47:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:48,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:48,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:48,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032789782] [2022-02-16 13:47:48,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032789782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:48,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564859619] [2022-02-16 13:47:48,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:48,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:48,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:48,692 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:48,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-16 13:47:48,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:47:48,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:48,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:48,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:48,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:48,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:49,072 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:49,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:49,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564859619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:49,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:49,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:49,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817258553] [2022-02-16 13:47:49,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:49,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:49,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:49,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:49,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:49,093 INFO L87 Difference]: Start difference. First operand 295 states and 862 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:49,554 INFO L93 Difference]: Finished difference Result 496 states and 1244 transitions. [2022-02-16 13:47:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:49,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:49,555 INFO L225 Difference]: With dead ends: 496 [2022-02-16 13:47:49,555 INFO L226 Difference]: Without dead ends: 495 [2022-02-16 13:47:49,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:49,555 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 238 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:49,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 126 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-16 13:47:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 300. [2022-02-16 13:47:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9264214046822743) internal successors, (875), 299 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 875 transitions. [2022-02-16 13:47:49,559 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 875 transitions. Word has length 20 [2022-02-16 13:47:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:49,559 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 875 transitions. [2022-02-16 13:47:49,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 875 transitions. [2022-02-16 13:47:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:49,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:49,560 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:49,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:49,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:49,775 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:49,776 INFO L85 PathProgramCache]: Analyzing trace with hash -896477246, now seen corresponding path program 52 times [2022-02-16 13:47:49,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:49,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045284212] [2022-02-16 13:47:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:49,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:49,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:49,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045284212] [2022-02-16 13:47:49,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045284212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:49,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762068257] [2022-02-16 13:47:49,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:49,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:49,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:49,932 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:49,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-16 13:47:49,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:49,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:50,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:50,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:50,416 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:50,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:50,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762068257] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:50,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:50,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:47:50,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023116596] [2022-02-16 13:47:50,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:50,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:50,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:50,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:50,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:50,436 INFO L87 Difference]: Start difference. First operand 300 states and 875 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:50,904 INFO L93 Difference]: Finished difference Result 520 states and 1284 transitions. [2022-02-16 13:47:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:47:50,904 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:50,905 INFO L225 Difference]: With dead ends: 520 [2022-02-16 13:47:50,905 INFO L226 Difference]: Without dead ends: 520 [2022-02-16 13:47:50,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:47:50,905 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 239 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:50,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 173 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-02-16 13:47:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 298. [2022-02-16 13:47:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.936026936026936) internal successors, (872), 297 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 872 transitions. [2022-02-16 13:47:50,910 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 872 transitions. Word has length 20 [2022-02-16 13:47:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:50,910 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 872 transitions. [2022-02-16 13:47:50,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 872 transitions. [2022-02-16 13:47:50,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:50,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:50,911 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:50,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:51,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-02-16 13:47:51,127 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:51,127 INFO L85 PathProgramCache]: Analyzing trace with hash -206755322, now seen corresponding path program 53 times [2022-02-16 13:47:51,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:51,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46801926] [2022-02-16 13:47:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:51,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:51,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:51,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46801926] [2022-02-16 13:47:51,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46801926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:51,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636487696] [2022-02-16 13:47:51,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:51,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:51,271 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:51,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-16 13:47:51,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:47:51,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:51,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:51,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:47:51,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:47:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:51,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:51,838 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:51,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:51,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636487696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:51,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:51,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:47:51,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433207615] [2022-02-16 13:47:51,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:51,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:51,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:51,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:51,861 INFO L87 Difference]: Start difference. First operand 298 states and 872 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:52,065 INFO L93 Difference]: Finished difference Result 392 states and 1163 transitions. [2022-02-16 13:47:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:52,066 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:52,066 INFO L225 Difference]: With dead ends: 392 [2022-02-16 13:47:52,066 INFO L226 Difference]: Without dead ends: 392 [2022-02-16 13:47:52,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:47:52,067 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:52,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 398 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-02-16 13:47:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-16 13:47:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 296. [2022-02-16 13:47:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.925423728813559) internal successors, (863), 295 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 863 transitions. [2022-02-16 13:47:52,071 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 863 transitions. Word has length 20 [2022-02-16 13:47:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:52,071 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 863 transitions. [2022-02-16 13:47:52,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 863 transitions. [2022-02-16 13:47:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:52,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:52,071 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:52,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:52,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-16 13:47:52,287 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1446036730, now seen corresponding path program 54 times [2022-02-16 13:47:52,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:52,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901081827] [2022-02-16 13:47:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:52,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:52,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:52,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901081827] [2022-02-16 13:47:52,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901081827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:52,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933509091] [2022-02-16 13:47:52,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:47:52,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:52,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:52,419 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:52,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-16 13:47:52,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:47:52,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:52,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:47:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:52,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:52,898 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:52,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:52,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933509091] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:52,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:52,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:52,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974710212] [2022-02-16 13:47:52,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:52,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:52,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:52,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:52,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:52,921 INFO L87 Difference]: Start difference. First operand 296 states and 863 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:53,432 INFO L93 Difference]: Finished difference Result 474 states and 1207 transitions. [2022-02-16 13:47:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:47:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:53,433 INFO L225 Difference]: With dead ends: 474 [2022-02-16 13:47:53,433 INFO L226 Difference]: Without dead ends: 472 [2022-02-16 13:47:53,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:47:53,434 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:53,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 129 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-02-16 13:47:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 300. [2022-02-16 13:47:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9130434782608696) internal successors, (871), 299 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 871 transitions. [2022-02-16 13:47:53,438 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 871 transitions. Word has length 20 [2022-02-16 13:47:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:53,438 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 871 transitions. [2022-02-16 13:47:53,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 871 transitions. [2022-02-16 13:47:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:53,438 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:53,438 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:53,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:53,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:53,655 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1733832770, now seen corresponding path program 55 times [2022-02-16 13:47:53,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:53,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596539570] [2022-02-16 13:47:53,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:53,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:53,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:53,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596539570] [2022-02-16 13:47:53,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596539570] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:53,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993690156] [2022-02-16 13:47:53,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:47:53,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:53,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:53,794 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:53,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-16 13:47:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:53,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:53,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:54,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:54,223 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:54,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:54,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993690156] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:54,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:54,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:47:54,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530500642] [2022-02-16 13:47:54,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:54,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:54,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:54,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:54,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:54,240 INFO L87 Difference]: Start difference. First operand 300 states and 871 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:54,724 INFO L93 Difference]: Finished difference Result 461 states and 1193 transitions. [2022-02-16 13:47:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:54,726 INFO L225 Difference]: With dead ends: 461 [2022-02-16 13:47:54,726 INFO L226 Difference]: Without dead ends: 461 [2022-02-16 13:47:54,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:47:54,726 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:54,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 132 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-02-16 13:47:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 297. [2022-02-16 13:47:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9222972972972974) internal successors, (865), 296 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 865 transitions. [2022-02-16 13:47:54,730 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 865 transitions. Word has length 20 [2022-02-16 13:47:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:54,730 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 865 transitions. [2022-02-16 13:47:54,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 865 transitions. [2022-02-16 13:47:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:54,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:54,731 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:54,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:54,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:54,939 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:54,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash 391604636, now seen corresponding path program 56 times [2022-02-16 13:47:54,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:54,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852022220] [2022-02-16 13:47:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:54,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:55,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:55,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852022220] [2022-02-16 13:47:55,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852022220] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:55,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650295113] [2022-02-16 13:47:55,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:47:55,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:55,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:55,096 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:55,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-16 13:47:55,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:55,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:55,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:55,676 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:55,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:55,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650295113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:55,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:55,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:47:55,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829830955] [2022-02-16 13:47:55,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:55,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:47:55,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:55,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:47:55,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:55,694 INFO L87 Difference]: Start difference. First operand 297 states and 865 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:56,242 INFO L93 Difference]: Finished difference Result 431 states and 1132 transitions. [2022-02-16 13:47:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:56,243 INFO L225 Difference]: With dead ends: 431 [2022-02-16 13:47:56,243 INFO L226 Difference]: Without dead ends: 431 [2022-02-16 13:47:56,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:47:56,244 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 102 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:56,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 86 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-16 13:47:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2022-02-16 13:47:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.923076923076923) internal successors, (874), 299 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 874 transitions. [2022-02-16 13:47:56,248 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 874 transitions. Word has length 20 [2022-02-16 13:47:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:56,248 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 874 transitions. [2022-02-16 13:47:56,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 874 transitions. [2022-02-16 13:47:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:56,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:56,248 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:56,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:56,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:56,455 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:56,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1106137492, now seen corresponding path program 57 times [2022-02-16 13:47:56,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:56,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17463001] [2022-02-16 13:47:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:56,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:56,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:56,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17463001] [2022-02-16 13:47:56,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17463001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:56,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264170602] [2022-02-16 13:47:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:47:56,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:56,594 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:56,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-16 13:47:56,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:47:56,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:56,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:56,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:47:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:57,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:57,232 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:57,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:57,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264170602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:57,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:57,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:47:57,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029075315] [2022-02-16 13:47:57,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:57,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:47:57,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:47:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:47:57,255 INFO L87 Difference]: Start difference. First operand 300 states and 874 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:57,885 INFO L93 Difference]: Finished difference Result 432 states and 1132 transitions. [2022-02-16 13:47:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:47:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:57,886 INFO L225 Difference]: With dead ends: 432 [2022-02-16 13:47:57,886 INFO L226 Difference]: Without dead ends: 431 [2022-02-16 13:47:57,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:47:57,886 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 134 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:57,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 88 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:47:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-16 13:47:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2022-02-16 13:47:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.923076923076923) internal successors, (874), 299 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 874 transitions. [2022-02-16 13:47:57,891 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 874 transitions. Word has length 20 [2022-02-16 13:47:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:57,891 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 874 transitions. [2022-02-16 13:47:57,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 874 transitions. [2022-02-16 13:47:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:57,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:57,892 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:57,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:58,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-16 13:47:58,109 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:58,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1693882814, now seen corresponding path program 58 times [2022-02-16 13:47:58,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:58,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427930213] [2022-02-16 13:47:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:58,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:58,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:58,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427930213] [2022-02-16 13:47:58,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427930213] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:58,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987484225] [2022-02-16 13:47:58,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:47:58,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:58,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:58,211 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:58,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-16 13:47:58,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:47:58,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:58,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:58,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:58,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:47:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:58,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:47:58,754 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:47:58,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:47:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:58,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987484225] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:47:58,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:47:58,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:47:58,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892306786] [2022-02-16 13:47:58,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:47:58,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:47:58,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:47:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:47:58,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:47:58,779 INFO L87 Difference]: Start difference. First operand 300 states and 874 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:59,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:47:59,176 INFO L93 Difference]: Finished difference Result 419 states and 1115 transitions. [2022-02-16 13:47:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:47:59,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:47:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:47:59,177 INFO L225 Difference]: With dead ends: 419 [2022-02-16 13:47:59,177 INFO L226 Difference]: Without dead ends: 417 [2022-02-16 13:47:59,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:47:59,177 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:47:59,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 73 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:47:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-02-16 13:47:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 299. [2022-02-16 13:47:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.922818791946309) internal successors, (871), 298 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 871 transitions. [2022-02-16 13:47:59,181 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 871 transitions. Word has length 20 [2022-02-16 13:47:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:47:59,181 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 871 transitions. [2022-02-16 13:47:59,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:47:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 871 transitions. [2022-02-16 13:47:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:47:59,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:47:59,182 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:47:59,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-16 13:47:59,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-16 13:47:59,387 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:47:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:47:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1741237408, now seen corresponding path program 59 times [2022-02-16 13:47:59,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:47:59,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739310225] [2022-02-16 13:47:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:47:59,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:47:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:47:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:59,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:47:59,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739310225] [2022-02-16 13:47:59,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739310225] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:47:59,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213749206] [2022-02-16 13:47:59,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:47:59,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:47:59,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:47:59,512 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:47:59,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-16 13:47:59,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:47:59,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:47:59,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:47:59,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:47:59,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:47:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:47:59,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:00,103 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:00,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:00,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213749206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:00,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:00,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:48:00,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393727773] [2022-02-16 13:48:00,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:00,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:48:00,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:48:00,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:00,118 INFO L87 Difference]: Start difference. First operand 299 states and 871 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:00,594 INFO L93 Difference]: Finished difference Result 471 states and 1196 transitions. [2022-02-16 13:48:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:00,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:00,595 INFO L225 Difference]: With dead ends: 471 [2022-02-16 13:48:00,595 INFO L226 Difference]: Without dead ends: 471 [2022-02-16 13:48:00,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:48:00,595 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 157 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:00,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 141 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:00,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-02-16 13:48:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 300. [2022-02-16 13:48:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9297658862876252) internal successors, (876), 299 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 876 transitions. [2022-02-16 13:48:00,601 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 876 transitions. Word has length 20 [2022-02-16 13:48:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:00,601 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 876 transitions. [2022-02-16 13:48:00,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 876 transitions. [2022-02-16 13:48:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:00,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:00,602 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:00,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:00,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:00,815 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:00,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1026704552, now seen corresponding path program 60 times [2022-02-16 13:48:00,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:00,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734282291] [2022-02-16 13:48:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:00,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:00,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:00,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734282291] [2022-02-16 13:48:00,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734282291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:00,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221990105] [2022-02-16 13:48:00,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:00,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:00,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:00,981 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:00,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-16 13:48:01,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:48:01,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:01,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:48:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:01,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:01,567 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:01,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:01,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221990105] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:01,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:01,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:01,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448325213] [2022-02-16 13:48:01,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:01,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:01,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:01,588 INFO L87 Difference]: Start difference. First operand 300 states and 876 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:02,146 INFO L93 Difference]: Finished difference Result 472 states and 1195 transitions. [2022-02-16 13:48:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:48:02,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:02,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:02,147 INFO L225 Difference]: With dead ends: 472 [2022-02-16 13:48:02,147 INFO L226 Difference]: Without dead ends: 471 [2022-02-16 13:48:02,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:48:02,148 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 166 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:02,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 143 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-02-16 13:48:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 304. [2022-02-16 13:48:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9306930693069306) internal successors, (888), 303 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 888 transitions. [2022-02-16 13:48:02,154 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 888 transitions. Word has length 20 [2022-02-16 13:48:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:02,154 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 888 transitions. [2022-02-16 13:48:02,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 888 transitions. [2022-02-16 13:48:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:02,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:02,155 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:02,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:02,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:02,369 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1532944100, now seen corresponding path program 61 times [2022-02-16 13:48:02,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:02,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444766825] [2022-02-16 13:48:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:02,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:02,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:02,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444766825] [2022-02-16 13:48:02,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444766825] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:02,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678658379] [2022-02-16 13:48:02,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:02,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:02,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:02,522 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:02,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-16 13:48:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:02,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:02,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:02,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:48:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:03,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:03,194 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:03,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:03,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678658379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:03,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:03,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:48:03,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747263607] [2022-02-16 13:48:03,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:03,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:48:03,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:48:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:03,218 INFO L87 Difference]: Start difference. First operand 304 states and 888 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:03,773 INFO L93 Difference]: Finished difference Result 473 states and 1198 transitions. [2022-02-16 13:48:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:03,773 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:03,774 INFO L225 Difference]: With dead ends: 473 [2022-02-16 13:48:03,774 INFO L226 Difference]: Without dead ends: 473 [2022-02-16 13:48:03,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:48:03,774 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 144 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:03,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 150 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-02-16 13:48:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 302. [2022-02-16 13:48:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9401993355481726) internal successors, (885), 301 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 885 transitions. [2022-02-16 13:48:03,779 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 885 transitions. Word has length 20 [2022-02-16 13:48:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:03,779 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 885 transitions. [2022-02-16 13:48:03,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 885 transitions. [2022-02-16 13:48:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:03,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:03,780 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:03,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-16 13:48:03,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:03,997 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:03,997 INFO L85 PathProgramCache]: Analyzing trace with hash -843222176, now seen corresponding path program 62 times [2022-02-16 13:48:03,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:03,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235229256] [2022-02-16 13:48:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:03,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:04,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:04,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235229256] [2022-02-16 13:48:04,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235229256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:04,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920322018] [2022-02-16 13:48:04,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:04,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:04,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:04,155 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:04,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-16 13:48:04,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:04,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:04,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:04,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:48:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:04,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:04,829 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:04,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:04,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920322018] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:04,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:04,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:48:04,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221851453] [2022-02-16 13:48:04,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:04,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:48:04,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:48:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:04,856 INFO L87 Difference]: Start difference. First operand 302 states and 885 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:05,325 INFO L93 Difference]: Finished difference Result 446 states and 1164 transitions. [2022-02-16 13:48:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:05,326 INFO L225 Difference]: With dead ends: 446 [2022-02-16 13:48:05,326 INFO L226 Difference]: Without dead ends: 446 [2022-02-16 13:48:05,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:05,327 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:05,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 124 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:05,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-02-16 13:48:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 300. [2022-02-16 13:48:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9297658862876252) internal successors, (876), 299 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 876 transitions. [2022-02-16 13:48:05,331 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 876 transitions. Word has length 20 [2022-02-16 13:48:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:05,331 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 876 transitions. [2022-02-16 13:48:05,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 876 transitions. [2022-02-16 13:48:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:05,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:05,332 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:05,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:05,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:05,548 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash 809569876, now seen corresponding path program 63 times [2022-02-16 13:48:05,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:05,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763400266] [2022-02-16 13:48:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:05,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:05,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:05,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763400266] [2022-02-16 13:48:05,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763400266] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:05,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848041843] [2022-02-16 13:48:05,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:05,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:05,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:05,700 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:05,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-16 13:48:05,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:48:05,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:05,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:05,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:48:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:05,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:06,078 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:06,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:06,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848041843] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:06,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:06,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:06,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206704967] [2022-02-16 13:48:06,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:06,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:06,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:06,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:06,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:06,095 INFO L87 Difference]: Start difference. First operand 300 states and 876 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:06,654 INFO L93 Difference]: Finished difference Result 464 states and 1188 transitions. [2022-02-16 13:48:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:48:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:06,655 INFO L225 Difference]: With dead ends: 464 [2022-02-16 13:48:06,655 INFO L226 Difference]: Without dead ends: 462 [2022-02-16 13:48:06,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:48:06,655 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 184 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:06,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 140 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-02-16 13:48:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 304. [2022-02-16 13:48:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9174917491749173) internal successors, (884), 303 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 884 transitions. [2022-02-16 13:48:06,662 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 884 transitions. Word has length 20 [2022-02-16 13:48:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:06,662 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 884 transitions. [2022-02-16 13:48:06,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 884 transitions. [2022-02-16 13:48:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:06,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:06,663 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:06,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-16 13:48:06,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-16 13:48:06,878 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:06,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:06,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1924667672, now seen corresponding path program 64 times [2022-02-16 13:48:06,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:06,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234144087] [2022-02-16 13:48:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:06,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:06,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:06,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234144087] [2022-02-16 13:48:06,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234144087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:06,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271023002] [2022-02-16 13:48:06,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:06,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:06,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:06,970 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:06,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-16 13:48:07,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:07,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:07,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:07,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:07,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:48:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:07,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:07,404 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:07,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:07,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271023002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:07,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:07,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:48:07,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188068271] [2022-02-16 13:48:07,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:07,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:48:07,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:07,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:48:07,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:07,443 INFO L87 Difference]: Start difference. First operand 304 states and 884 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:07,863 INFO L93 Difference]: Finished difference Result 451 states and 1174 transitions. [2022-02-16 13:48:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:07,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:07,864 INFO L225 Difference]: With dead ends: 451 [2022-02-16 13:48:07,864 INFO L226 Difference]: Without dead ends: 451 [2022-02-16 13:48:07,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:48:07,865 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:07,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 120 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:07,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-02-16 13:48:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 299. [2022-02-16 13:48:07,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.922818791946309) internal successors, (871), 298 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 871 transitions. [2022-02-16 13:48:07,871 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 871 transitions. Word has length 20 [2022-02-16 13:48:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:07,872 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 871 transitions. [2022-02-16 13:48:07,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 871 transitions. [2022-02-16 13:48:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:07,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:07,873 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:07,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:08,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:08,086 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:08,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1511152062, now seen corresponding path program 65 times [2022-02-16 13:48:08,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:08,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809442124] [2022-02-16 13:48:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:08,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:08,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:08,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809442124] [2022-02-16 13:48:08,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809442124] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:08,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579961963] [2022-02-16 13:48:08,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:08,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:08,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:08,162 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:08,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-16 13:48:08,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:08,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:08,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:08,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:08,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:08,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:08,592 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:08,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:08,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579961963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:08,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:08,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:48:08,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834919481] [2022-02-16 13:48:08,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:08,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:08,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:08,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:08,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:08,610 INFO L87 Difference]: Start difference. First operand 299 states and 871 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:08,924 INFO L93 Difference]: Finished difference Result 417 states and 1111 transitions. [2022-02-16 13:48:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:08,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:08,925 INFO L225 Difference]: With dead ends: 417 [2022-02-16 13:48:08,925 INFO L226 Difference]: Without dead ends: 414 [2022-02-16 13:48:08,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:08,925 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:08,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 70 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-02-16 13:48:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 300. [2022-02-16 13:48:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.919732441471572) internal successors, (873), 299 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 873 transitions. [2022-02-16 13:48:08,929 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 873 transitions. Word has length 20 [2022-02-16 13:48:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:08,929 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 873 transitions. [2022-02-16 13:48:08,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 873 transitions. [2022-02-16 13:48:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:08,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:08,929 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:08,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-16 13:48:09,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-16 13:48:09,143 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:09,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:09,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1302858754, now seen corresponding path program 66 times [2022-02-16 13:48:09,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:09,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427931258] [2022-02-16 13:48:09,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:09,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:09,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:09,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427931258] [2022-02-16 13:48:09,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427931258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:09,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402168721] [2022-02-16 13:48:09,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:09,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:09,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:09,229 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:09,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-16 13:48:09,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:48:09,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:09,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:09,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:09,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:48:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:09,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:09,730 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:09,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:09,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402168721] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:09,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:09,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:09,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394653062] [2022-02-16 13:48:09,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:09,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:09,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:09,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:09,748 INFO L87 Difference]: Start difference. First operand 300 states and 873 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:10,314 INFO L93 Difference]: Finished difference Result 430 states and 1128 transitions. [2022-02-16 13:48:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:10,315 INFO L225 Difference]: With dead ends: 430 [2022-02-16 13:48:10,315 INFO L226 Difference]: Without dead ends: 428 [2022-02-16 13:48:10,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:48:10,315 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:10,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 119 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-16 13:48:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 304. [2022-02-16 13:48:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.907590759075908) internal successors, (881), 303 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 881 transitions. [2022-02-16 13:48:10,319 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 881 transitions. Word has length 20 [2022-02-16 13:48:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:10,319 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 881 transitions. [2022-02-16 13:48:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 881 transitions. [2022-02-16 13:48:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:10,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:10,320 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:10,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:10,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-16 13:48:10,536 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -187760958, now seen corresponding path program 67 times [2022-02-16 13:48:10,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:10,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000098984] [2022-02-16 13:48:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:10,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:10,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:10,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000098984] [2022-02-16 13:48:10,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000098984] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:10,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675970414] [2022-02-16 13:48:10,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:10,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:10,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:10,670 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:10,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-16 13:48:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:10,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:10,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:48:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:11,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:11,165 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:11,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:11,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675970414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:11,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:11,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:48:11,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311602411] [2022-02-16 13:48:11,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:11,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:48:11,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:48:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:11,184 INFO L87 Difference]: Start difference. First operand 304 states and 881 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:11,598 INFO L93 Difference]: Finished difference Result 417 states and 1114 transitions. [2022-02-16 13:48:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:11,599 INFO L225 Difference]: With dead ends: 417 [2022-02-16 13:48:11,599 INFO L226 Difference]: Without dead ends: 417 [2022-02-16 13:48:11,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:11,599 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 78 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:11,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 75 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-02-16 13:48:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 300. [2022-02-16 13:48:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.919732441471572) internal successors, (873), 299 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 873 transitions. [2022-02-16 13:48:11,603 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 873 transitions. Word has length 20 [2022-02-16 13:48:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:11,603 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 873 transitions. [2022-02-16 13:48:11,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:11,603 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 873 transitions. [2022-02-16 13:48:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:11,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:11,603 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:11,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:11,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-16 13:48:11,818 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash 913064360, now seen corresponding path program 68 times [2022-02-16 13:48:11,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:11,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691658355] [2022-02-16 13:48:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:11,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:11,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:11,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691658355] [2022-02-16 13:48:11,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691658355] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:11,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419717416] [2022-02-16 13:48:11,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:11,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:11,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:11,914 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:11,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-16 13:48:11,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:11,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:11,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:11,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:12,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:12,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:12,441 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:12,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:12,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419717416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:12,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:12,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:48:12,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906537525] [2022-02-16 13:48:12,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:12,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:12,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:12,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:12,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:12,459 INFO L87 Difference]: Start difference. First operand 300 states and 873 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:12,987 INFO L93 Difference]: Finished difference Result 516 states and 1324 transitions. [2022-02-16 13:48:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:12,989 INFO L225 Difference]: With dead ends: 516 [2022-02-16 13:48:12,989 INFO L226 Difference]: Without dead ends: 516 [2022-02-16 13:48:12,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:48:12,989 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 160 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:12,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 109 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-02-16 13:48:12,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 304. [2022-02-16 13:48:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9207920792079207) internal successors, (885), 303 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 885 transitions. [2022-02-16 13:48:12,993 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 885 transitions. Word has length 20 [2022-02-16 13:48:12,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:12,993 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 885 transitions. [2022-02-16 13:48:12,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 885 transitions. [2022-02-16 13:48:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:12,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:12,994 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:13,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:13,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-16 13:48:13,210 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:13,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:13,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1627597216, now seen corresponding path program 69 times [2022-02-16 13:48:13,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:13,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264429927] [2022-02-16 13:48:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:13,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:13,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:13,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264429927] [2022-02-16 13:48:13,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264429927] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:13,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714559019] [2022-02-16 13:48:13,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:13,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:13,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:13,321 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:13,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-16 13:48:13,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:48:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:13,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:13,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:13,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:13,906 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:13,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:13,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714559019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:13,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:13,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:48:13,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018426615] [2022-02-16 13:48:13,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:13,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:13,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:13,935 INFO L87 Difference]: Start difference. First operand 304 states and 885 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:14,539 INFO L93 Difference]: Finished difference Result 517 states and 1324 transitions. [2022-02-16 13:48:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:48:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:14,540 INFO L225 Difference]: With dead ends: 517 [2022-02-16 13:48:14,540 INFO L226 Difference]: Without dead ends: 516 [2022-02-16 13:48:14,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:48:14,540 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:14,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 121 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-02-16 13:48:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 304. [2022-02-16 13:48:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9207920792079207) internal successors, (885), 303 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 885 transitions. [2022-02-16 13:48:14,546 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 885 transitions. Word has length 20 [2022-02-16 13:48:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:14,546 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 885 transitions. [2022-02-16 13:48:14,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:14,546 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 885 transitions. [2022-02-16 13:48:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:14,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:14,547 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:14,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:14,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:14,763 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2079624758, now seen corresponding path program 70 times [2022-02-16 13:48:14,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:14,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953174993] [2022-02-16 13:48:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:14,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:14,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:14,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953174993] [2022-02-16 13:48:14,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953174993] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:14,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148286095] [2022-02-16 13:48:14,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:14,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:14,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:14,870 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:14,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-16 13:48:14,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:14,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:14,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:15,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:15,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:15,353 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:15,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:15,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148286095] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:15,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:15,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:15,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46269531] [2022-02-16 13:48:15,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:15,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:15,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:15,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:15,372 INFO L87 Difference]: Start difference. First operand 304 states and 885 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:16,157 INFO L93 Difference]: Finished difference Result 504 states and 1307 transitions. [2022-02-16 13:48:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:16,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:16,158 INFO L225 Difference]: With dead ends: 504 [2022-02-16 13:48:16,158 INFO L226 Difference]: Without dead ends: 502 [2022-02-16 13:48:16,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:48:16,158 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 160 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:16,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 114 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-02-16 13:48:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 303. [2022-02-16 13:48:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9205298013245033) internal successors, (882), 302 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 882 transitions. [2022-02-16 13:48:16,163 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 882 transitions. Word has length 20 [2022-02-16 13:48:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:16,163 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 882 transitions. [2022-02-16 13:48:16,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 882 transitions. [2022-02-16 13:48:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:16,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:16,164 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:16,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:16,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:16,379 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:16,380 INFO L85 PathProgramCache]: Analyzing trace with hash 886645118, now seen corresponding path program 71 times [2022-02-16 13:48:16,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:16,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980370176] [2022-02-16 13:48:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:16,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:16,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:16,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980370176] [2022-02-16 13:48:16,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980370176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:16,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962884188] [2022-02-16 13:48:16,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:16,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:16,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:16,479 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:16,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-16 13:48:16,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:16,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:16,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:16,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:16,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:16,972 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:16,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:16,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962884188] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:16,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:16,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:48:16,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10865231] [2022-02-16 13:48:16,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:16,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:48:16,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:48:16,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:48:16,992 INFO L87 Difference]: Start difference. First operand 303 states and 882 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:17,441 INFO L93 Difference]: Finished difference Result 514 states and 1315 transitions. [2022-02-16 13:48:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:17,442 INFO L225 Difference]: With dead ends: 514 [2022-02-16 13:48:17,442 INFO L226 Difference]: Without dead ends: 511 [2022-02-16 13:48:17,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:17,443 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 170 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:17,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 89 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-16 13:48:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 302. [2022-02-16 13:48:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.920265780730897) internal successors, (879), 301 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 879 transitions. [2022-02-16 13:48:17,447 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 879 transitions. Word has length 20 [2022-02-16 13:48:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:17,447 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 879 transitions. [2022-02-16 13:48:17,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 879 transitions. [2022-02-16 13:48:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:17,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:17,447 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:17,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:17,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:17,664 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash -145888220, now seen corresponding path program 72 times [2022-02-16 13:48:17,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:17,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319182193] [2022-02-16 13:48:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:17,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:17,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:17,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319182193] [2022-02-16 13:48:17,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319182193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:17,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890306028] [2022-02-16 13:48:17,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:17,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:17,773 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:17,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-16 13:48:17,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:48:17,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:17,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:17,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:18,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:18,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:18,354 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:18,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:18,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890306028] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:18,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:18,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:48:18,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946915616] [2022-02-16 13:48:18,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:18,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:18,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:18,377 INFO L87 Difference]: Start difference. First operand 302 states and 879 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:18,930 INFO L93 Difference]: Finished difference Result 498 states and 1293 transitions. [2022-02-16 13:48:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:18,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:18,931 INFO L225 Difference]: With dead ends: 498 [2022-02-16 13:48:18,931 INFO L226 Difference]: Without dead ends: 498 [2022-02-16 13:48:18,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:48:18,932 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:18,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 95 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-16 13:48:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 305. [2022-02-16 13:48:18,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9210526315789473) internal successors, (888), 304 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 888 transitions. [2022-02-16 13:48:18,936 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 888 transitions. Word has length 20 [2022-02-16 13:48:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:18,936 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 888 transitions. [2022-02-16 13:48:18,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 888 transitions. [2022-02-16 13:48:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:18,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:18,937 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:18,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:19,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-02-16 13:48:19,153 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:19,153 INFO L85 PathProgramCache]: Analyzing trace with hash 568644636, now seen corresponding path program 73 times [2022-02-16 13:48:19,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:19,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340494162] [2022-02-16 13:48:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:19,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:19,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:19,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340494162] [2022-02-16 13:48:19,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340494162] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:19,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705601227] [2022-02-16 13:48:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:19,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:19,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:19,261 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:19,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-16 13:48:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:19,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:19,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:48:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:19,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:19,773 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:19,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:19,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705601227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:19,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:19,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:19,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093733340] [2022-02-16 13:48:19,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:19,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:19,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:19,791 INFO L87 Difference]: Start difference. First operand 305 states and 888 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:20,553 INFO L93 Difference]: Finished difference Result 499 states and 1293 transitions. [2022-02-16 13:48:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:48:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:20,554 INFO L225 Difference]: With dead ends: 499 [2022-02-16 13:48:20,554 INFO L226 Difference]: Without dead ends: 498 [2022-02-16 13:48:20,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:20,554 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 182 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:20,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 127 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-16 13:48:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 305. [2022-02-16 13:48:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9210526315789473) internal successors, (888), 304 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 888 transitions. [2022-02-16 13:48:20,558 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 888 transitions. Word has length 20 [2022-02-16 13:48:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:20,558 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 888 transitions. [2022-02-16 13:48:20,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 888 transitions. [2022-02-16 13:48:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:20,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:20,559 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:20,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:20,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:20,775 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1156389958, now seen corresponding path program 74 times [2022-02-16 13:48:20,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:20,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559589099] [2022-02-16 13:48:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:20,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:20,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:20,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559589099] [2022-02-16 13:48:20,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559589099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:20,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236397439] [2022-02-16 13:48:20,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:20,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:20,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:20,893 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:20,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-16 13:48:20,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:20,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:20,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:21,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:21,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:21,398 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:21,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:21,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236397439] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:21,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:21,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:48:21,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922495750] [2022-02-16 13:48:21,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:21,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:21,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:21,413 INFO L87 Difference]: Start difference. First operand 305 states and 888 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:21,797 INFO L93 Difference]: Finished difference Result 486 states and 1276 transitions. [2022-02-16 13:48:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:21,798 INFO L225 Difference]: With dead ends: 486 [2022-02-16 13:48:21,798 INFO L226 Difference]: Without dead ends: 484 [2022-02-16 13:48:21,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:48:21,799 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:21,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 101 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-02-16 13:48:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 303. [2022-02-16 13:48:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9271523178807946) internal successors, (884), 302 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 884 transitions. [2022-02-16 13:48:21,803 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 884 transitions. Word has length 20 [2022-02-16 13:48:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:21,803 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 884 transitions. [2022-02-16 13:48:21,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 884 transitions. [2022-02-16 13:48:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:21,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:21,804 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:21,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:22,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:22,020 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:22,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2016237032, now seen corresponding path program 75 times [2022-02-16 13:48:22,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:22,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793995240] [2022-02-16 13:48:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:22,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:22,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:22,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793995240] [2022-02-16 13:48:22,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793995240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:22,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067782482] [2022-02-16 13:48:22,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:22,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:22,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:22,103 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:22,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-16 13:48:22,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:48:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:22,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:48:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:22,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:22,675 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:22,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:22,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067782482] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:22,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:22,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:48:22,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782398000] [2022-02-16 13:48:22,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:22,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:22,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:22,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:22,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:22,694 INFO L87 Difference]: Start difference. First operand 303 states and 884 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:23,209 INFO L93 Difference]: Finished difference Result 535 states and 1348 transitions. [2022-02-16 13:48:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:23,210 INFO L225 Difference]: With dead ends: 535 [2022-02-16 13:48:23,210 INFO L226 Difference]: Without dead ends: 535 [2022-02-16 13:48:23,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:23,211 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 261 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:23,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 123 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-16 13:48:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 304. [2022-02-16 13:48:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.933993399339934) internal successors, (889), 303 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 889 transitions. [2022-02-16 13:48:23,215 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 889 transitions. Word has length 20 [2022-02-16 13:48:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:23,215 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 889 transitions. [2022-02-16 13:48:23,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 889 transitions. [2022-02-16 13:48:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:23,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:23,216 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:23,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:23,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-02-16 13:48:23,430 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1564197408, now seen corresponding path program 76 times [2022-02-16 13:48:23,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:23,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188693767] [2022-02-16 13:48:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:23,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:23,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:23,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188693767] [2022-02-16 13:48:23,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188693767] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:23,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426480421] [2022-02-16 13:48:23,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:23,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:23,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:23,512 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:23,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-16 13:48:23,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:23,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:23,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:23,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:48:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:23,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:23,968 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:23,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:24,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426480421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:24,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:24,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:48:24,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585059416] [2022-02-16 13:48:24,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:24,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:24,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:24,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:24,014 INFO L87 Difference]: Start difference. First operand 304 states and 889 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:24,768 INFO L93 Difference]: Finished difference Result 536 states and 1347 transitions. [2022-02-16 13:48:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:48:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:24,769 INFO L225 Difference]: With dead ends: 536 [2022-02-16 13:48:24,769 INFO L226 Difference]: Without dead ends: 535 [2022-02-16 13:48:24,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:48:24,770 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 290 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:24,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 136 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-16 13:48:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 308. [2022-02-16 13:48:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.9348534201954397) internal successors, (901), 307 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 901 transitions. [2022-02-16 13:48:24,774 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 901 transitions. Word has length 20 [2022-02-16 13:48:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:24,774 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 901 transitions. [2022-02-16 13:48:24,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 901 transitions. [2022-02-16 13:48:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:24,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:24,775 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:24,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:24,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-16 13:48:24,991 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2070436956, now seen corresponding path program 77 times [2022-02-16 13:48:24,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:24,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435445688] [2022-02-16 13:48:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:24,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:25,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:25,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435445688] [2022-02-16 13:48:25,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435445688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:25,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671439209] [2022-02-16 13:48:25,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:25,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:25,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:25,106 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:25,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-16 13:48:25,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:48:25,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:25,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:25,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:48:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:25,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:25,621 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:25,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:25,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671439209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:25,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:25,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:48:25,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273027297] [2022-02-16 13:48:25,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:25,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:48:25,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:25,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:48:25,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:25,635 INFO L87 Difference]: Start difference. First operand 308 states and 901 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:26,142 INFO L93 Difference]: Finished difference Result 524 states and 1333 transitions. [2022-02-16 13:48:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:26,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:26,142 INFO L225 Difference]: With dead ends: 524 [2022-02-16 13:48:26,143 INFO L226 Difference]: Without dead ends: 524 [2022-02-16 13:48:26,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:48:26,143 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:26,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 124 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-02-16 13:48:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 306. [2022-02-16 13:48:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.944262295081967) internal successors, (898), 305 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 898 transitions. [2022-02-16 13:48:26,147 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 898 transitions. Word has length 20 [2022-02-16 13:48:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:26,147 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 898 transitions. [2022-02-16 13:48:26,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 898 transitions. [2022-02-16 13:48:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:26,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:26,148 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:26,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:26,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:26,364 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:26,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1380715032, now seen corresponding path program 78 times [2022-02-16 13:48:26,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:26,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224543688] [2022-02-16 13:48:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:26,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:26,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:26,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224543688] [2022-02-16 13:48:26,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224543688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:26,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980616815] [2022-02-16 13:48:26,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:26,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:26,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:26,447 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:26,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-16 13:48:26,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:48:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:26,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:26,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:26,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:48:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:26,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:27,111 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:27,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:27,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980616815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:27,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:27,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:48:27,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484907713] [2022-02-16 13:48:27,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:27,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:27,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:27,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:27,131 INFO L87 Difference]: Start difference. First operand 306 states and 898 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:27,624 INFO L93 Difference]: Finished difference Result 510 states and 1316 transitions. [2022-02-16 13:48:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:27,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:27,624 INFO L225 Difference]: With dead ends: 510 [2022-02-16 13:48:27,625 INFO L226 Difference]: Without dead ends: 510 [2022-02-16 13:48:27,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:48:27,625 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:27,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 116 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-02-16 13:48:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 304. [2022-02-16 13:48:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.933993399339934) internal successors, (889), 303 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 889 transitions. [2022-02-16 13:48:27,629 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 889 transitions. Word has length 20 [2022-02-16 13:48:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:27,629 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 889 transitions. [2022-02-16 13:48:27,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 889 transitions. [2022-02-16 13:48:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:27,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:27,630 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:27,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:27,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:27,846 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash 272077020, now seen corresponding path program 79 times [2022-02-16 13:48:27,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:27,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500060255] [2022-02-16 13:48:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:27,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:27,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:27,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500060255] [2022-02-16 13:48:27,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500060255] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:27,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135077404] [2022-02-16 13:48:27,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:27,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:27,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:27,953 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:27,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-16 13:48:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:28,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:28,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:28,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:48:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:28,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:28,517 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:28,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:28,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135077404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:28,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:28,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:48:28,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792989672] [2022-02-16 13:48:28,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:28,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:28,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:28,538 INFO L87 Difference]: Start difference. First operand 304 states and 889 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:29,345 INFO L93 Difference]: Finished difference Result 526 states and 1336 transitions. [2022-02-16 13:48:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:48:29,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:29,346 INFO L225 Difference]: With dead ends: 526 [2022-02-16 13:48:29,346 INFO L226 Difference]: Without dead ends: 524 [2022-02-16 13:48:29,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:48:29,347 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 224 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:29,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 105 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-02-16 13:48:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 308. [2022-02-16 13:48:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.9218241042345277) internal successors, (897), 307 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 897 transitions. [2022-02-16 13:48:29,351 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 897 transitions. Word has length 20 [2022-02-16 13:48:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:29,351 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 897 transitions. [2022-02-16 13:48:29,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 897 transitions. [2022-02-16 13:48:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:29,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:29,352 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:29,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:29,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:29,553 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1387174816, now seen corresponding path program 80 times [2022-02-16 13:48:29,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:29,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005756893] [2022-02-16 13:48:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:29,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:29,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:29,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005756893] [2022-02-16 13:48:29,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005756893] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:29,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851856874] [2022-02-16 13:48:29,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:29,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:29,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:29,649 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:29,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-16 13:48:29,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:29,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:29,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:29,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:48:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:30,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:30,178 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:30,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:30,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851856874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:30,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:30,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:48:30,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531522475] [2022-02-16 13:48:30,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:30,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:48:30,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:30,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:48:30,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:30,192 INFO L87 Difference]: Start difference. First operand 308 states and 897 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:30,945 INFO L93 Difference]: Finished difference Result 515 states and 1326 transitions. [2022-02-16 13:48:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:30,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:30,946 INFO L225 Difference]: With dead ends: 515 [2022-02-16 13:48:30,947 INFO L226 Difference]: Without dead ends: 515 [2022-02-16 13:48:30,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:48:30,947 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 182 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:30,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 132 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-02-16 13:48:30,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 303. [2022-02-16 13:48:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9271523178807946) internal successors, (884), 302 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 884 transitions. [2022-02-16 13:48:30,951 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 884 transitions. Word has length 20 [2022-02-16 13:48:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:30,951 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 884 transitions. [2022-02-16 13:48:30,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 884 transitions. [2022-02-16 13:48:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:30,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:30,952 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:30,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:31,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:31,167 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2048644918, now seen corresponding path program 81 times [2022-02-16 13:48:31,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:31,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805034504] [2022-02-16 13:48:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:31,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:31,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:31,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805034504] [2022-02-16 13:48:31,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805034504] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:31,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697228679] [2022-02-16 13:48:31,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:31,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:31,266 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:31,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-16 13:48:31,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:48:31,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:31,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:31,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:31,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:31,626 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:31,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:31,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697228679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:31,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:31,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:48:31,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179716162] [2022-02-16 13:48:31,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:31,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:31,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:31,644 INFO L87 Difference]: Start difference. First operand 303 states and 884 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:32,017 INFO L93 Difference]: Finished difference Result 485 states and 1271 transitions. [2022-02-16 13:48:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:32,018 INFO L225 Difference]: With dead ends: 485 [2022-02-16 13:48:32,018 INFO L226 Difference]: Without dead ends: 482 [2022-02-16 13:48:32,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:48:32,019 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:32,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 74 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-02-16 13:48:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 304. [2022-02-16 13:48:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.924092409240924) internal successors, (886), 303 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 886 transitions. [2022-02-16 13:48:32,023 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 886 transitions. Word has length 20 [2022-02-16 13:48:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:32,023 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 886 transitions. [2022-02-16 13:48:32,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 886 transitions. [2022-02-16 13:48:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:32,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:32,023 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:32,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:32,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:32,240 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1840351610, now seen corresponding path program 82 times [2022-02-16 13:48:32,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:32,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015756675] [2022-02-16 13:48:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:32,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:32,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:32,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015756675] [2022-02-16 13:48:32,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015756675] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:32,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707507512] [2022-02-16 13:48:32,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:32,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:32,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:32,340 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:32,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-16 13:48:32,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:32,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:32,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:32,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:32,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:48:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:32,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:32,849 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:32,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:32,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707507512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:32,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:32,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:32,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787443657] [2022-02-16 13:48:32,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:32,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:32,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:32,875 INFO L87 Difference]: Start difference. First operand 304 states and 886 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:33,620 INFO L93 Difference]: Finished difference Result 498 states and 1288 transitions. [2022-02-16 13:48:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:33,621 INFO L225 Difference]: With dead ends: 498 [2022-02-16 13:48:33,621 INFO L226 Difference]: Without dead ends: 496 [2022-02-16 13:48:33,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:48:33,621 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:33,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 122 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-16 13:48:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 308. [2022-02-16 13:48:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.9120521172638436) internal successors, (894), 307 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 894 transitions. [2022-02-16 13:48:33,626 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 894 transitions. Word has length 20 [2022-02-16 13:48:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:33,626 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 894 transitions. [2022-02-16 13:48:33,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 894 transitions. [2022-02-16 13:48:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:33,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:33,626 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:33,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:33,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-02-16 13:48:33,842 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash -725253814, now seen corresponding path program 83 times [2022-02-16 13:48:33,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:33,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322646194] [2022-02-16 13:48:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:33,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:33,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:33,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322646194] [2022-02-16 13:48:33,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322646194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:33,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426516827] [2022-02-16 13:48:33,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:33,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:33,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:33,903 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:33,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-16 13:48:33,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:48:33,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:34,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:48:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:34,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:34,410 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:34,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:34,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426516827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:34,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:34,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:48:34,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854980581] [2022-02-16 13:48:34,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:34,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:34,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:34,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:34,432 INFO L87 Difference]: Start difference. First operand 308 states and 894 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:34,928 INFO L93 Difference]: Finished difference Result 485 states and 1274 transitions. [2022-02-16 13:48:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:34,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:34,929 INFO L225 Difference]: With dead ends: 485 [2022-02-16 13:48:34,929 INFO L226 Difference]: Without dead ends: 485 [2022-02-16 13:48:34,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:48:34,930 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 87 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:34,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 99 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-16 13:48:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 302. [2022-02-16 13:48:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.920265780730897) internal successors, (879), 301 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 879 transitions. [2022-02-16 13:48:34,934 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 879 transitions. Word has length 20 [2022-02-16 13:48:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:34,934 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 879 transitions. [2022-02-16 13:48:34,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 879 transitions. [2022-02-16 13:48:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:34,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:34,934 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:34,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:35,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:35,135 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash 314811770, now seen corresponding path program 84 times [2022-02-16 13:48:35,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:35,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684693659] [2022-02-16 13:48:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:35,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:35,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:35,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684693659] [2022-02-16 13:48:35,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684693659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:35,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238937452] [2022-02-16 13:48:35,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:35,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:35,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:35,208 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:35,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-16 13:48:35,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:48:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:35,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:35,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:35,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:35,553 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:35,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:35,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238937452] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:35,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:35,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:48:35,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432309478] [2022-02-16 13:48:35,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:35,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:35,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:35,567 INFO L87 Difference]: Start difference. First operand 302 states and 879 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:35,923 INFO L93 Difference]: Finished difference Result 489 states and 1268 transitions. [2022-02-16 13:48:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:35,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:35,924 INFO L225 Difference]: With dead ends: 489 [2022-02-16 13:48:35,924 INFO L226 Difference]: Without dead ends: 485 [2022-02-16 13:48:35,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:48:35,925 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 216 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:35,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 97 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-16 13:48:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 303. [2022-02-16 13:48:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9172185430463577) internal successors, (881), 302 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 881 transitions. [2022-02-16 13:48:35,930 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 881 transitions. Word has length 20 [2022-02-16 13:48:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:35,930 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 881 transitions. [2022-02-16 13:48:35,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 881 transitions. [2022-02-16 13:48:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:35,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:35,931 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:35,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:36,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:36,144 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash 973388670, now seen corresponding path program 85 times [2022-02-16 13:48:36,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:36,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099544249] [2022-02-16 13:48:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:36,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:36,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:36,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099544249] [2022-02-16 13:48:36,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099544249] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:36,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784876425] [2022-02-16 13:48:36,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:36,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:36,272 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:36,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-16 13:48:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:36,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:36,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:36,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:36,877 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:36,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:36,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784876425] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:36,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:36,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:36,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597455507] [2022-02-16 13:48:36,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:36,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:36,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:36,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:36,898 INFO L87 Difference]: Start difference. First operand 303 states and 881 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:37,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:37,302 INFO L93 Difference]: Finished difference Result 477 states and 1255 transitions. [2022-02-16 13:48:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:37,302 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:37,303 INFO L225 Difference]: With dead ends: 477 [2022-02-16 13:48:37,303 INFO L226 Difference]: Without dead ends: 474 [2022-02-16 13:48:37,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:48:37,304 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 133 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:37,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 102 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-02-16 13:48:37,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 304. [2022-02-16 13:48:37,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9141914191419143) internal successors, (883), 303 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 883 transitions. [2022-02-16 13:48:37,308 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 883 transitions. Word has length 20 [2022-02-16 13:48:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:37,308 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 883 transitions. [2022-02-16 13:48:37,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 883 transitions. [2022-02-16 13:48:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:37,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:37,308 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:37,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:37,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:37,525 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1181681978, now seen corresponding path program 86 times [2022-02-16 13:48:37,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:37,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454099959] [2022-02-16 13:48:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:37,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:37,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:37,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454099959] [2022-02-16 13:48:37,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454099959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:37,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849059635] [2022-02-16 13:48:37,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:37,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:37,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:37,648 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:37,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-16 13:48:37,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:37,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:37,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:37,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:37,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:38,050 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:38,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:48:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:38,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849059635] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:38,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:38,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:38,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421861958] [2022-02-16 13:48:38,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:38,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:38,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:38,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:38,098 INFO L87 Difference]: Start difference. First operand 304 states and 883 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:38,897 INFO L93 Difference]: Finished difference Result 489 states and 1269 transitions. [2022-02-16 13:48:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:38,897 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:38,898 INFO L225 Difference]: With dead ends: 489 [2022-02-16 13:48:38,898 INFO L226 Difference]: Without dead ends: 487 [2022-02-16 13:48:38,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:48:38,898 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 203 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:38,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 154 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-02-16 13:48:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 308. [2022-02-16 13:48:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.9022801302931596) internal successors, (891), 307 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 891 transitions. [2022-02-16 13:48:38,902 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 891 transitions. Word has length 20 [2022-02-16 13:48:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:38,902 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 891 transitions. [2022-02-16 13:48:38,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 891 transitions. [2022-02-16 13:48:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:38,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:38,903 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:38,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:39,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:39,119 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1998187522, now seen corresponding path program 87 times [2022-02-16 13:48:39,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:39,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374340933] [2022-02-16 13:48:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:39,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:39,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:39,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374340933] [2022-02-16 13:48:39,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374340933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:39,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357055422] [2022-02-16 13:48:39,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:39,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:39,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:39,218 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:39,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-16 13:48:39,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:48:39,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:39,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-16 13:48:39,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:39,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2022-02-16 13:48:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:39,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:39,964 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:48:39,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 95 [2022-02-16 13:48:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:40,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357055422] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:40,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:40,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-02-16 13:48:40,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116395776] [2022-02-16 13:48:40,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:40,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:48:40,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:40,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:48:40,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:48:40,022 INFO L87 Difference]: Start difference. First operand 308 states and 891 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:40,389 INFO L93 Difference]: Finished difference Result 476 states and 1255 transitions. [2022-02-16 13:48:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:40,390 INFO L225 Difference]: With dead ends: 476 [2022-02-16 13:48:40,390 INFO L226 Difference]: Without dead ends: 476 [2022-02-16 13:48:40,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:48:40,390 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:40,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 115 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-02-16 13:48:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 303. [2022-02-16 13:48:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9172185430463577) internal successors, (881), 302 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 881 transitions. [2022-02-16 13:48:40,394 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 881 transitions. Word has length 20 [2022-02-16 13:48:40,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:40,395 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 881 transitions. [2022-02-16 13:48:40,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 881 transitions. [2022-02-16 13:48:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:40,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:40,395 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:40,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:40,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:40,611 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:40,612 INFO L85 PathProgramCache]: Analyzing trace with hash -695455170, now seen corresponding path program 88 times [2022-02-16 13:48:40,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:40,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866664238] [2022-02-16 13:48:40,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:40,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:40,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:40,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866664238] [2022-02-16 13:48:40,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866664238] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:40,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699618212] [2022-02-16 13:48:40,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:40,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:40,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:40,718 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:40,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-16 13:48:40,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:40,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:40,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:40,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:40,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:41,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:41,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:41,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:41,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699618212] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:41,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:41,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:48:41,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824972280] [2022-02-16 13:48:41,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:41,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:41,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:41,191 INFO L87 Difference]: Start difference. First operand 303 states and 881 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:41,478 INFO L93 Difference]: Finished difference Result 348 states and 957 transitions. [2022-02-16 13:48:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:41,479 INFO L225 Difference]: With dead ends: 348 [2022-02-16 13:48:41,479 INFO L226 Difference]: Without dead ends: 348 [2022-02-16 13:48:41,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:48:41,479 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 73 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:41,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 91 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-16 13:48:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 306. [2022-02-16 13:48:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.904918032786885) internal successors, (886), 305 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 886 transitions. [2022-02-16 13:48:41,483 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 886 transitions. Word has length 20 [2022-02-16 13:48:41,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:41,483 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 886 transitions. [2022-02-16 13:48:41,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 886 transitions. [2022-02-16 13:48:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:41,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:41,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:41,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-16 13:48:41,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-02-16 13:48:41,691 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:41,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1530184318, now seen corresponding path program 89 times [2022-02-16 13:48:41,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:41,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411415695] [2022-02-16 13:48:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:41,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:41,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:41,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411415695] [2022-02-16 13:48:41,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411415695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:41,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599045757] [2022-02-16 13:48:41,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:41,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:41,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:41,808 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:41,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-16 13:48:41,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:41,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:41,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:41,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:41,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:42,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:42,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:42,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:42,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599045757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:42,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:42,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:48:42,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887078589] [2022-02-16 13:48:42,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:42,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:42,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:42,203 INFO L87 Difference]: Start difference. First operand 306 states and 886 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:42,382 INFO L93 Difference]: Finished difference Result 365 states and 980 transitions. [2022-02-16 13:48:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:42,383 INFO L225 Difference]: With dead ends: 365 [2022-02-16 13:48:42,383 INFO L226 Difference]: Without dead ends: 365 [2022-02-16 13:48:42,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:48:42,384 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:42,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 91 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-16 13:48:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 306. [2022-02-16 13:48:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.904918032786885) internal successors, (886), 305 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 886 transitions. [2022-02-16 13:48:42,388 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 886 transitions. Word has length 20 [2022-02-16 13:48:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:42,388 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 886 transitions. [2022-02-16 13:48:42,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 886 transitions. [2022-02-16 13:48:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:42,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:42,388 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:42,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-02-16 13:48:42,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:42,600 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash -815651462, now seen corresponding path program 90 times [2022-02-16 13:48:42,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:42,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440601539] [2022-02-16 13:48:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:42,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:42,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:42,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440601539] [2022-02-16 13:48:42,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440601539] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:42,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096499388] [2022-02-16 13:48:42,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:42,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:42,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:42,680 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:42,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-16 13:48:42,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:48:42,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:42,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:42,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:42,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:42,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:42,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:43,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096499388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:43,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:43,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:48:43,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295921803] [2022-02-16 13:48:43,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:43,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:43,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:43,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:43,056 INFO L87 Difference]: Start difference. First operand 306 states and 886 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:43,282 INFO L93 Difference]: Finished difference Result 350 states and 960 transitions. [2022-02-16 13:48:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:43,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:43,282 INFO L225 Difference]: With dead ends: 350 [2022-02-16 13:48:43,282 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:48:43,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:48:43,283 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:43,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 99 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:48:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 305. [2022-02-16 13:48:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9078947368421053) internal successors, (884), 304 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 884 transitions. [2022-02-16 13:48:43,286 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 884 transitions. Word has length 20 [2022-02-16 13:48:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:43,287 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 884 transitions. [2022-02-16 13:48:43,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 884 transitions. [2022-02-16 13:48:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:43,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:43,287 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:43,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-16 13:48:43,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:43,503 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:43,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:43,503 INFO L85 PathProgramCache]: Analyzing trace with hash -47049380, now seen corresponding path program 91 times [2022-02-16 13:48:43,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:43,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461734610] [2022-02-16 13:48:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:43,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:43,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:43,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461734610] [2022-02-16 13:48:43,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461734610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:43,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633730370] [2022-02-16 13:48:43,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:43,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:43,610 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:43,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-16 13:48:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:43,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:43,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:48:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:43,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:44,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:44,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:44,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633730370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:44,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:44,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:44,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352899149] [2022-02-16 13:48:44,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:44,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:44,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:44,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:44,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:44,111 INFO L87 Difference]: Start difference. First operand 305 states and 884 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:44,405 INFO L93 Difference]: Finished difference Result 343 states and 947 transitions. [2022-02-16 13:48:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:44,405 INFO L225 Difference]: With dead ends: 343 [2022-02-16 13:48:44,406 INFO L226 Difference]: Without dead ends: 343 [2022-02-16 13:48:44,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:48:44,406 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:44,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 103 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-16 13:48:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 306. [2022-02-16 13:48:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.908196721311475) internal successors, (887), 305 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 887 transitions. [2022-02-16 13:48:44,409 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 887 transitions. Word has length 20 [2022-02-16 13:48:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:44,409 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 887 transitions. [2022-02-16 13:48:44,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 887 transitions. [2022-02-16 13:48:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:44,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:44,410 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:44,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:44,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:44,611 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:44,612 INFO L85 PathProgramCache]: Analyzing trace with hash 667483476, now seen corresponding path program 92 times [2022-02-16 13:48:44,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:44,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892374041] [2022-02-16 13:48:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:44,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:44,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:44,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892374041] [2022-02-16 13:48:44,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892374041] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:44,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137911167] [2022-02-16 13:48:44,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:44,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:44,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:44,725 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:44,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-16 13:48:44,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:44,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:44,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:44,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:48:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:45,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:45,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:45,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:45,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137911167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:45,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:45,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:48:45,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470081067] [2022-02-16 13:48:45,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:45,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:45,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:45,179 INFO L87 Difference]: Start difference. First operand 306 states and 887 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:45,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:45,432 INFO L93 Difference]: Finished difference Result 344 states and 947 transitions. [2022-02-16 13:48:45,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:48:45,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:45,432 INFO L225 Difference]: With dead ends: 344 [2022-02-16 13:48:45,432 INFO L226 Difference]: Without dead ends: 343 [2022-02-16 13:48:45,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:48:45,433 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:45,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 86 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-16 13:48:45,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 306. [2022-02-16 13:48:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.908196721311475) internal successors, (887), 305 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 887 transitions. [2022-02-16 13:48:45,436 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 887 transitions. Word has length 20 [2022-02-16 13:48:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:45,437 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 887 transitions. [2022-02-16 13:48:45,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 887 transitions. [2022-02-16 13:48:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:45,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:45,437 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:45,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:45,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:45,652 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:45,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1255228798, now seen corresponding path program 93 times [2022-02-16 13:48:45,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:45,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155774188] [2022-02-16 13:48:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:45,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:45,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:45,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155774188] [2022-02-16 13:48:45,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155774188] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:45,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024653998] [2022-02-16 13:48:45,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:45,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:45,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:45,736 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:45,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-16 13:48:45,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:48:45,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:45,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:46,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:46,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:46,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:46,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:46,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024653998] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:46,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:46,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:48:46,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634797488] [2022-02-16 13:48:46,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:46,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:46,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:46,214 INFO L87 Difference]: Start difference. First operand 306 states and 887 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:46,573 INFO L93 Difference]: Finished difference Result 330 states and 929 transitions. [2022-02-16 13:48:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:46,574 INFO L225 Difference]: With dead ends: 330 [2022-02-16 13:48:46,574 INFO L226 Difference]: Without dead ends: 328 [2022-02-16 13:48:46,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:48:46,574 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:46,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 63 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-16 13:48:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 303. [2022-02-16 13:48:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9172185430463577) internal successors, (881), 302 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 881 transitions. [2022-02-16 13:48:46,578 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 881 transitions. Word has length 20 [2022-02-16 13:48:46,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:46,578 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 881 transitions. [2022-02-16 13:48:46,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 881 transitions. [2022-02-16 13:48:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:46,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:46,578 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:46,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:46,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:46,782 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:46,782 INFO L85 PathProgramCache]: Analyzing trace with hash -872373219, now seen corresponding path program 94 times [2022-02-16 13:48:46,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:46,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487658782] [2022-02-16 13:48:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:46,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:46,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:46,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487658782] [2022-02-16 13:48:46,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487658782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:46,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779354484] [2022-02-16 13:48:46,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:46,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:46,853 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:46,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-16 13:48:46,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:46,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:46,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:46,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:47,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:48:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:47,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:47,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:47,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:48:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:47,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779354484] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:47,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:47,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-02-16 13:48:47,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139722369] [2022-02-16 13:48:47,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:47,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:47,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:47,218 INFO L87 Difference]: Start difference. First operand 303 states and 881 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:47,466 INFO L93 Difference]: Finished difference Result 385 states and 1060 transitions. [2022-02-16 13:48:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:47,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:47,467 INFO L225 Difference]: With dead ends: 385 [2022-02-16 13:48:47,467 INFO L226 Difference]: Without dead ends: 358 [2022-02-16 13:48:47,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:47,467 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:47,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 125 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-16 13:48:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 299. [2022-02-16 13:48:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.8993288590604025) internal successors, (864), 298 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 864 transitions. [2022-02-16 13:48:47,471 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 864 transitions. Word has length 20 [2022-02-16 13:48:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:47,471 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 864 transitions. [2022-02-16 13:48:47,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 864 transitions. [2022-02-16 13:48:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:47,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:47,471 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:47,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:47,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-02-16 13:48:47,675 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1905918202, now seen corresponding path program 95 times [2022-02-16 13:48:47,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:47,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453946987] [2022-02-16 13:48:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:47,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:47,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:47,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453946987] [2022-02-16 13:48:47,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453946987] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:47,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722524578] [2022-02-16 13:48:47,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:47,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:47,775 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:47,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-16 13:48:47,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:47,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:47,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:47,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:48,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:48,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:48,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:48,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722524578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:48,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:48,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:48:48,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400544426] [2022-02-16 13:48:48,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:48,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:48,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:48,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:48,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:48,223 INFO L87 Difference]: Start difference. First operand 299 states and 864 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:48,550 INFO L93 Difference]: Finished difference Result 425 states and 1084 transitions. [2022-02-16 13:48:48,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:48,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:48,551 INFO L225 Difference]: With dead ends: 425 [2022-02-16 13:48:48,551 INFO L226 Difference]: Without dead ends: 425 [2022-02-16 13:48:48,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:48:48,551 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 109 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:48,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 154 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-02-16 13:48:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 303. [2022-02-16 13:48:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.884105960264901) internal successors, (871), 302 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 871 transitions. [2022-02-16 13:48:48,555 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 871 transitions. Word has length 20 [2022-02-16 13:48:48,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:48,555 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 871 transitions. [2022-02-16 13:48:48,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 871 transitions. [2022-02-16 13:48:48,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:48,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:48,556 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:48,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:48,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-16 13:48:48,772 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1071189054, now seen corresponding path program 96 times [2022-02-16 13:48:48,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:48,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118180413] [2022-02-16 13:48:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:48,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:48,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:48,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118180413] [2022-02-16 13:48:48,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118180413] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:48,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672787975] [2022-02-16 13:48:48,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:48,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:48,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:48,852 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:48,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-16 13:48:48,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:48:48,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:48,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:48,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:49,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:49,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:49,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:49,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:49,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672787975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:49,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:49,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:48:49,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606636548] [2022-02-16 13:48:49,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:49,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:49,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:49,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:49,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:49,326 INFO L87 Difference]: Start difference. First operand 303 states and 871 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:49,563 INFO L93 Difference]: Finished difference Result 438 states and 1103 transitions. [2022-02-16 13:48:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:49,564 INFO L225 Difference]: With dead ends: 438 [2022-02-16 13:48:49,564 INFO L226 Difference]: Without dead ends: 438 [2022-02-16 13:48:49,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:48:49,564 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:49,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 139 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-02-16 13:48:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 303. [2022-02-16 13:48:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.884105960264901) internal successors, (871), 302 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 871 transitions. [2022-02-16 13:48:49,568 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 871 transitions. Word has length 20 [2022-02-16 13:48:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:49,568 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 871 transitions. [2022-02-16 13:48:49,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 871 transitions. [2022-02-16 13:48:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:49,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:49,569 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:49,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-16 13:48:49,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:49,773 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1785721910, now seen corresponding path program 97 times [2022-02-16 13:48:49,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:49,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776888933] [2022-02-16 13:48:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:49,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:49,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:49,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776888933] [2022-02-16 13:48:49,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776888933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:49,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714990109] [2022-02-16 13:48:49,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:49,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:49,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:49,876 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:49,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-16 13:48:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:49,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:50,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:48:50,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:48:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:50,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:50,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:50,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:50,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714990109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:50,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:50,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:48:50,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560208793] [2022-02-16 13:48:50,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:50,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:48:50,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:50,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:48:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:48:50,425 INFO L87 Difference]: Start difference. First operand 303 states and 871 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:50,672 INFO L93 Difference]: Finished difference Result 400 states and 1066 transitions. [2022-02-16 13:48:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:50,673 INFO L225 Difference]: With dead ends: 400 [2022-02-16 13:48:50,673 INFO L226 Difference]: Without dead ends: 399 [2022-02-16 13:48:50,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:48:50,673 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:50,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 141 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 468 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-02-16 13:48:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-16 13:48:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 300. [2022-02-16 13:48:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.8929765886287626) internal successors, (865), 299 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 865 transitions. [2022-02-16 13:48:50,677 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 865 transitions. Word has length 20 [2022-02-16 13:48:50,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:50,677 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 865 transitions. [2022-02-16 13:48:50,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:50,677 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 865 transitions. [2022-02-16 13:48:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:50,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:50,677 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:50,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:50,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:50,886 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:50,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1187174711, now seen corresponding path program 98 times [2022-02-16 13:48:50,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:50,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445254122] [2022-02-16 13:48:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:50,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:50,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:50,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445254122] [2022-02-16 13:48:50,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445254122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:50,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893995888] [2022-02-16 13:48:50,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:50,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:50,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:50,957 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:50,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-16 13:48:51,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:51,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:51,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:51,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:51,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:51,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:51,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:51,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:48:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:51,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893995888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:51,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:51,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-02-16 13:48:51,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681720460] [2022-02-16 13:48:51,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:51,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:48:51,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:51,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:48:51,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:48:51,380 INFO L87 Difference]: Start difference. First operand 300 states and 865 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:51,643 INFO L93 Difference]: Finished difference Result 426 states and 1123 transitions. [2022-02-16 13:48:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:51,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:51,644 INFO L225 Difference]: With dead ends: 426 [2022-02-16 13:48:51,644 INFO L226 Difference]: Without dead ends: 399 [2022-02-16 13:48:51,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:48:51,644 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:51,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 146 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-16 13:48:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 296. [2022-02-16 13:48:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.8610169491525426) internal successors, (844), 295 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 844 transitions. [2022-02-16 13:48:51,648 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 844 transitions. Word has length 20 [2022-02-16 13:48:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:51,648 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 844 transitions. [2022-02-16 13:48:51,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 844 transitions. [2022-02-16 13:48:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:51,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:51,648 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:51,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-02-16 13:48:51,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-16 13:48:51,855 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash -736700294, now seen corresponding path program 99 times [2022-02-16 13:48:51,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:51,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000559459] [2022-02-16 13:48:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:51,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:51,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:51,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000559459] [2022-02-16 13:48:51,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000559459] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:51,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414164457] [2022-02-16 13:48:51,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:51,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:51,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:51,985 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:51,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-16 13:48:52,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:48:52,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:52,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:52,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:52,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:52,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:52,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:52,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:52,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414164457] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:52,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:52,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:52,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974207993] [2022-02-16 13:48:52,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:52,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:52,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:52,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:52,513 INFO L87 Difference]: Start difference. First operand 296 states and 844 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:52,894 INFO L93 Difference]: Finished difference Result 407 states and 1038 transitions. [2022-02-16 13:48:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:48:52,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:52,895 INFO L225 Difference]: With dead ends: 407 [2022-02-16 13:48:52,895 INFO L226 Difference]: Without dead ends: 407 [2022-02-16 13:48:52,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:48:52,895 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:52,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 186 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-16 13:48:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 294. [2022-02-16 13:48:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.849829351535836) internal successors, (835), 293 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 835 transitions. [2022-02-16 13:48:52,899 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 835 transitions. Word has length 20 [2022-02-16 13:48:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:52,899 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 835 transitions. [2022-02-16 13:48:52,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 835 transitions. [2022-02-16 13:48:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:52,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:52,899 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:52,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:53,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:53,109 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:53,110 INFO L85 PathProgramCache]: Analyzing trace with hash -502768193, now seen corresponding path program 100 times [2022-02-16 13:48:53,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:53,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183192031] [2022-02-16 13:48:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:53,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:53,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:53,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183192031] [2022-02-16 13:48:53,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183192031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:53,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077113882] [2022-02-16 13:48:53,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:53,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:53,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:53,149 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:53,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-16 13:48:53,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:53,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:53,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:53,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:53,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:48:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:53,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:53,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:53,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:48:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:53,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077113882] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:53,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:53,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-02-16 13:48:53,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294389135] [2022-02-16 13:48:53,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:53,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:48:53,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:53,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:48:53,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:48:53,444 INFO L87 Difference]: Start difference. First operand 294 states and 835 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:53,599 INFO L93 Difference]: Finished difference Result 374 states and 993 transitions. [2022-02-16 13:48:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:53,600 INFO L225 Difference]: With dead ends: 374 [2022-02-16 13:48:53,600 INFO L226 Difference]: Without dead ends: 338 [2022-02-16 13:48:53,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:53,601 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:53,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 106 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-16 13:48:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 288. [2022-02-16 13:48:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.8013937282229966) internal successors, (804), 287 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 804 transitions. [2022-02-16 13:48:53,604 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 804 transitions. Word has length 20 [2022-02-16 13:48:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:53,604 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 804 transitions. [2022-02-16 13:48:53,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 804 transitions. [2022-02-16 13:48:53,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:53,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:53,605 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:53,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:53,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:53,811 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:53,811 INFO L85 PathProgramCache]: Analyzing trace with hash -131442374, now seen corresponding path program 101 times [2022-02-16 13:48:53,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:53,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632230865] [2022-02-16 13:48:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:53,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:53,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:53,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632230865] [2022-02-16 13:48:53,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632230865] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:53,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785191917] [2022-02-16 13:48:53,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:48:53,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:53,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:53,935 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:53,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-16 13:48:54,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:54,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:54,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:54,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:48:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:54,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:54,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:54,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:54,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785191917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:54,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:54,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:48:54,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464070576] [2022-02-16 13:48:54,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:54,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:54,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:54,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:54,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:54,301 INFO L87 Difference]: Start difference. First operand 288 states and 804 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:54,502 INFO L93 Difference]: Finished difference Result 427 states and 1051 transitions. [2022-02-16 13:48:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:54,503 INFO L225 Difference]: With dead ends: 427 [2022-02-16 13:48:54,503 INFO L226 Difference]: Without dead ends: 426 [2022-02-16 13:48:54,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:48:54,505 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:54,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 149 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-02-16 13:48:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 285. [2022-02-16 13:48:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.8028169014084505) internal successors, (796), 284 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 796 transitions. [2022-02-16 13:48:54,509 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 796 transitions. Word has length 20 [2022-02-16 13:48:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:54,510 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 796 transitions. [2022-02-16 13:48:54,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 796 transitions. [2022-02-16 13:48:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:54,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:54,512 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:54,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:54,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-16 13:48:54,727 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash -637681922, now seen corresponding path program 102 times [2022-02-16 13:48:54,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:54,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542178073] [2022-02-16 13:48:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:54,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:54,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:54,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542178073] [2022-02-16 13:48:54,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542178073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:54,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819776608] [2022-02-16 13:48:54,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:48:54,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:54,806 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:54,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-16 13:48:54,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:48:54,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:54,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:54,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:54,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:55,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:55,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:55,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:55,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819776608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:55,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:55,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:55,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584138636] [2022-02-16 13:48:55,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:55,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:55,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:55,199 INFO L87 Difference]: Start difference. First operand 285 states and 796 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:55,599 INFO L93 Difference]: Finished difference Result 451 states and 1091 transitions. [2022-02-16 13:48:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:55,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:55,600 INFO L225 Difference]: With dead ends: 451 [2022-02-16 13:48:55,600 INFO L226 Difference]: Without dead ends: 451 [2022-02-16 13:48:55,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:48:55,600 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 227 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:55,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 161 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-02-16 13:48:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 285. [2022-02-16 13:48:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.8098591549295775) internal successors, (798), 284 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 798 transitions. [2022-02-16 13:48:55,604 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 798 transitions. Word has length 20 [2022-02-16 13:48:55,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:55,604 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 798 transitions. [2022-02-16 13:48:55,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 798 transitions. [2022-02-16 13:48:55,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:55,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:55,605 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:55,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-02-16 13:48:55,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-16 13:48:55,814 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 52040002, now seen corresponding path program 103 times [2022-02-16 13:48:55,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:55,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321001258] [2022-02-16 13:48:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:55,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:55,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:55,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321001258] [2022-02-16 13:48:55,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321001258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:55,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929793791] [2022-02-16 13:48:55,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:48:55,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:55,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:55,918 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:55,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-16 13:48:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:56,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:56,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:48:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:56,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:56,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:56,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:56,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929793791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:56,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:56,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:56,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729872599] [2022-02-16 13:48:56,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:56,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:56,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:56,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:56,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:56,316 INFO L87 Difference]: Start difference. First operand 285 states and 798 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:56,515 INFO L93 Difference]: Finished difference Result 422 states and 1055 transitions. [2022-02-16 13:48:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:56,515 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:56,516 INFO L225 Difference]: With dead ends: 422 [2022-02-16 13:48:56,516 INFO L226 Difference]: Without dead ends: 422 [2022-02-16 13:48:56,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:48:56,516 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:56,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 156 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-02-16 13:48:56,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 283. [2022-02-16 13:48:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.797872340425532) internal successors, (789), 282 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 789 transitions. [2022-02-16 13:48:56,520 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 789 transitions. Word has length 20 [2022-02-16 13:48:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:56,520 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 789 transitions. [2022-02-16 13:48:56,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 789 transitions. [2022-02-16 13:48:56,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:56,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:56,520 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:56,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:56,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:56,727 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:56,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:56,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1704832054, now seen corresponding path program 104 times [2022-02-16 13:48:56,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:56,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093806910] [2022-02-16 13:48:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:56,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:56,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:56,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093806910] [2022-02-16 13:48:56,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093806910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:56,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760871793] [2022-02-16 13:48:56,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:48:56,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:56,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:56,833 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:56,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-16 13:48:56,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:48:56,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:56,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:56,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:56,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:57,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:57,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:57,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:57,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760871793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:57,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:57,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:48:57,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492944539] [2022-02-16 13:48:57,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:57,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:48:57,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:48:57,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:48:57,272 INFO L87 Difference]: Start difference. First operand 283 states and 789 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:57,644 INFO L93 Difference]: Finished difference Result 405 states and 1014 transitions. [2022-02-16 13:48:57,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:48:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:57,645 INFO L225 Difference]: With dead ends: 405 [2022-02-16 13:48:57,645 INFO L226 Difference]: Without dead ends: 403 [2022-02-16 13:48:57,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:48:57,646 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 159 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:57,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 159 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-16 13:48:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 286. [2022-02-16 13:48:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.7929824561403507) internal successors, (796), 285 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 796 transitions. [2022-02-16 13:48:57,652 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 796 transitions. Word has length 20 [2022-02-16 13:48:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:57,652 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 796 transitions. [2022-02-16 13:48:57,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 796 transitions. [2022-02-16 13:48:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:57,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:57,653 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:57,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-16 13:48:57,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:57,867 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1475037446, now seen corresponding path program 105 times [2022-02-16 13:48:57,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:57,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842326741] [2022-02-16 13:48:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:57,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:57,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:57,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842326741] [2022-02-16 13:48:57,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842326741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:57,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058229529] [2022-02-16 13:48:57,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:48:57,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:57,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:57,967 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:57,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-16 13:48:58,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:48:58,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:58,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:58,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:58,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:58,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:58,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:58,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058229529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:58,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:58,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:58,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532747905] [2022-02-16 13:48:58,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:58,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:58,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:58,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:58,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:58,391 INFO L87 Difference]: Start difference. First operand 286 states and 796 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:58,661 INFO L93 Difference]: Finished difference Result 392 states and 1000 transitions. [2022-02-16 13:48:58,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:58,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:58,662 INFO L225 Difference]: With dead ends: 392 [2022-02-16 13:48:58,662 INFO L226 Difference]: Without dead ends: 392 [2022-02-16 13:48:58,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:48:58,662 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:58,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 167 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:48:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-16 13:48:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 282. [2022-02-16 13:48:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.790035587188612) internal successors, (784), 281 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 784 transitions. [2022-02-16 13:48:58,665 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 784 transitions. Word has length 20 [2022-02-16 13:48:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:58,666 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 784 transitions. [2022-02-16 13:48:58,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 784 transitions. [2022-02-16 13:48:58,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:58,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:58,666 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:58,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-02-16 13:48:58,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-02-16 13:48:58,871 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:48:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:48:58,871 INFO L85 PathProgramCache]: Analyzing trace with hash 650399960, now seen corresponding path program 106 times [2022-02-16 13:48:58,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:48:58,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058882490] [2022-02-16 13:48:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:48:58,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:48:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:48:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:58,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:48:58,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058882490] [2022-02-16 13:48:58,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058882490] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:48:58,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10879107] [2022-02-16 13:48:58,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:48:58,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:48:58,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:48:58,981 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:48:58,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-16 13:48:59,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:48:59,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:48:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:48:59,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:48:59,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:48:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:59,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:48:59,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:48:59,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:48:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:48:59,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10879107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:48:59,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:48:59,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:48:59,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903418441] [2022-02-16 13:48:59,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:48:59,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:48:59,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:48:59,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:48:59,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:48:59,600 INFO L87 Difference]: Start difference. First operand 282 states and 784 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:48:59,966 INFO L93 Difference]: Finished difference Result 330 states and 875 transitions. [2022-02-16 13:48:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:48:59,966 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:48:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:48:59,966 INFO L225 Difference]: With dead ends: 330 [2022-02-16 13:48:59,967 INFO L226 Difference]: Without dead ends: 330 [2022-02-16 13:48:59,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:48:59,967 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 67 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:48:59,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 77 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:48:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-16 13:48:59,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 286. [2022-02-16 13:48:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.7929824561403507) internal successors, (796), 285 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 796 transitions. [2022-02-16 13:48:59,970 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 796 transitions. Word has length 20 [2022-02-16 13:48:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:48:59,970 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 796 transitions. [2022-02-16 13:48:59,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:48:59,970 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 796 transitions. [2022-02-16 13:48:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:48:59,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:48:59,971 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:48:59,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:00,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-16 13:49:00,179 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1364932816, now seen corresponding path program 107 times [2022-02-16 13:49:00,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:00,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831501171] [2022-02-16 13:49:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:00,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:00,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:00,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831501171] [2022-02-16 13:49:00,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831501171] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:00,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851644820] [2022-02-16 13:49:00,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:00,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:00,278 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:00,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-16 13:49:00,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:00,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:00,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:00,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:00,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:49:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:00,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:00,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:00,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:00,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851644820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:00,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:00,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:00,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209824918] [2022-02-16 13:49:00,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:00,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:00,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:00,817 INFO L87 Difference]: Start difference. First operand 286 states and 796 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:01,229 INFO L93 Difference]: Finished difference Result 331 states and 875 transitions. [2022-02-16 13:49:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:49:01,230 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:01,230 INFO L225 Difference]: With dead ends: 331 [2022-02-16 13:49:01,230 INFO L226 Difference]: Without dead ends: 330 [2022-02-16 13:49:01,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:01,231 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 68 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:01,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 89 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-16 13:49:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 285. [2022-02-16 13:49:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.7922535211267605) internal successors, (793), 284 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 793 transitions. [2022-02-16 13:49:01,234 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 793 transitions. Word has length 20 [2022-02-16 13:49:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:01,234 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 793 transitions. [2022-02-16 13:49:01,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 793 transitions. [2022-02-16 13:49:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:01,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:01,235 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:01,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:01,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:01,447 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1952678138, now seen corresponding path program 108 times [2022-02-16 13:49:01,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:01,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508010499] [2022-02-16 13:49:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:01,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:01,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:01,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508010499] [2022-02-16 13:49:01,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508010499] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:01,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154257375] [2022-02-16 13:49:01,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:01,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:01,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:01,529 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:01,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-16 13:49:01,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:49:01,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:01,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:01,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:01,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:02,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:02,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:02,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154257375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:02,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:02,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:02,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954689993] [2022-02-16 13:49:02,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:02,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:02,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:02,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:02,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:02,060 INFO L87 Difference]: Start difference. First operand 285 states and 793 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:02,455 INFO L93 Difference]: Finished difference Result 318 states and 858 transitions. [2022-02-16 13:49:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:02,456 INFO L225 Difference]: With dead ends: 318 [2022-02-16 13:49:02,456 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:49:02,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:02,457 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:02,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 77 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:02,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:49:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 283. [2022-02-16 13:49:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.797872340425532) internal successors, (789), 282 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 789 transitions. [2022-02-16 13:49:02,462 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 789 transitions. Word has length 20 [2022-02-16 13:49:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:02,462 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 789 transitions. [2022-02-16 13:49:02,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 789 transitions. [2022-02-16 13:49:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:02,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:02,462 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:02,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-02-16 13:49:02,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:02,679 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1482442084, now seen corresponding path program 109 times [2022-02-16 13:49:02,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:02,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728024738] [2022-02-16 13:49:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:02,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:02,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:02,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728024738] [2022-02-16 13:49:02,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728024738] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:02,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082274957] [2022-02-16 13:49:02,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:02,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:02,788 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:02,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-16 13:49:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:02,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:02,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:03,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:49:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:03,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:03,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:03,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:03,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082274957] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:03,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:03,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:03,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442236914] [2022-02-16 13:49:03,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:03,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:03,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:03,340 INFO L87 Difference]: Start difference. First operand 283 states and 789 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:03,717 INFO L93 Difference]: Finished difference Result 370 states and 939 transitions. [2022-02-16 13:49:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:03,718 INFO L225 Difference]: With dead ends: 370 [2022-02-16 13:49:03,718 INFO L226 Difference]: Without dead ends: 370 [2022-02-16 13:49:03,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:49:03,718 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:03,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 150 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-16 13:49:03,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 289. [2022-02-16 13:49:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.8090277777777777) internal successors, (809), 288 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 809 transitions. [2022-02-16 13:49:03,722 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 809 transitions. Word has length 20 [2022-02-16 13:49:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:03,722 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 809 transitions. [2022-02-16 13:49:03,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 809 transitions. [2022-02-16 13:49:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:03,722 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:03,722 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:03,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-02-16 13:49:03,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-02-16 13:49:03,935 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash -767909228, now seen corresponding path program 110 times [2022-02-16 13:49:03,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:03,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917941065] [2022-02-16 13:49:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:03,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:04,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:04,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917941065] [2022-02-16 13:49:04,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917941065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:04,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362688413] [2022-02-16 13:49:04,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:04,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:04,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:04,075 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:04,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-16 13:49:04,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:04,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:04,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:49:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:04,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:04,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:04,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:04,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362688413] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:04,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:04,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:04,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944220727] [2022-02-16 13:49:04,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:04,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:04,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:04,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:04,736 INFO L87 Difference]: Start difference. First operand 289 states and 809 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:05,173 INFO L93 Difference]: Finished difference Result 371 states and 938 transitions. [2022-02-16 13:49:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:49:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:05,174 INFO L225 Difference]: With dead ends: 371 [2022-02-16 13:49:05,174 INFO L226 Difference]: Without dead ends: 370 [2022-02-16 13:49:05,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:49:05,174 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:05,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 158 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-16 13:49:05,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 286. [2022-02-16 13:49:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.8105263157894735) internal successors, (801), 285 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 801 transitions. [2022-02-16 13:49:05,178 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 801 transitions. Word has length 20 [2022-02-16 13:49:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:05,178 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 801 transitions. [2022-02-16 13:49:05,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 801 transitions. [2022-02-16 13:49:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:05,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:05,178 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:05,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:05,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-16 13:49:05,395 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:05,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1274148776, now seen corresponding path program 111 times [2022-02-16 13:49:05,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:05,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78244060] [2022-02-16 13:49:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:05,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:05,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:05,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78244060] [2022-02-16 13:49:05,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78244060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:05,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761173812] [2022-02-16 13:49:05,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:05,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:05,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:05,521 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:05,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-16 13:49:05,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:05,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:05,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:05,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:49:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:05,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:06,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:06,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:06,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761173812] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:06,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:06,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:06,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346578029] [2022-02-16 13:49:06,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:06,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:06,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:06,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:06,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:06,103 INFO L87 Difference]: Start difference. First operand 286 states and 801 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:06,446 INFO L93 Difference]: Finished difference Result 372 states and 941 transitions. [2022-02-16 13:49:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:06,447 INFO L225 Difference]: With dead ends: 372 [2022-02-16 13:49:06,447 INFO L226 Difference]: Without dead ends: 372 [2022-02-16 13:49:06,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:49:06,447 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:06,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 144 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-16 13:49:06,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 286. [2022-02-16 13:49:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.8175438596491227) internal successors, (803), 285 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 803 transitions. [2022-02-16 13:49:06,450 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 803 transitions. Word has length 20 [2022-02-16 13:49:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:06,450 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 803 transitions. [2022-02-16 13:49:06,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 803 transitions. [2022-02-16 13:49:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:06,451 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:06,451 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:06,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:06,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-16 13:49:06,660 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash -584426852, now seen corresponding path program 112 times [2022-02-16 13:49:06,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:06,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624503561] [2022-02-16 13:49:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:06,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:06,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:06,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624503561] [2022-02-16 13:49:06,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624503561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:06,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709451920] [2022-02-16 13:49:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:06,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:06,766 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:06,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-16 13:49:06,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:06,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:06,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:06,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:07,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:49:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:07,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:07,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:07,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:07,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709451920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:07,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:07,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:07,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599862001] [2022-02-16 13:49:07,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:07,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:07,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:07,352 INFO L87 Difference]: Start difference. First operand 286 states and 803 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:07,652 INFO L93 Difference]: Finished difference Result 345 states and 907 transitions. [2022-02-16 13:49:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:07,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:07,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:07,652 INFO L225 Difference]: With dead ends: 345 [2022-02-16 13:49:07,652 INFO L226 Difference]: Without dead ends: 345 [2022-02-16 13:49:07,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:07,653 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:07,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 124 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-16 13:49:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 284. [2022-02-16 13:49:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.8056537102473498) internal successors, (794), 283 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 794 transitions. [2022-02-16 13:49:07,656 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 794 transitions. Word has length 20 [2022-02-16 13:49:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:07,656 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 794 transitions. [2022-02-16 13:49:07,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 794 transitions. [2022-02-16 13:49:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:07,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:07,656 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:07,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:07,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-16 13:49:07,872 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1068365200, now seen corresponding path program 113 times [2022-02-16 13:49:07,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:07,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197172479] [2022-02-16 13:49:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:07,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:07,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:07,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197172479] [2022-02-16 13:49:07,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197172479] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:07,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152304010] [2022-02-16 13:49:07,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:07,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:07,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:07,967 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:07,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-16 13:49:08,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:08,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:08,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:08,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:08,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:49:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:08,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:08,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:08,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:08,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152304010] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:08,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:08,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:08,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857583925] [2022-02-16 13:49:08,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:08,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:08,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:08,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:08,436 INFO L87 Difference]: Start difference. First operand 284 states and 794 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:08,828 INFO L93 Difference]: Finished difference Result 363 states and 931 transitions. [2022-02-16 13:49:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:49:08,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:08,829 INFO L225 Difference]: With dead ends: 363 [2022-02-16 13:49:08,829 INFO L226 Difference]: Without dead ends: 361 [2022-02-16 13:49:08,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:49:08,829 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:08,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 118 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:08,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-16 13:49:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 287. [2022-02-16 13:49:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.800699300699301) internal successors, (801), 286 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 801 transitions. [2022-02-16 13:49:08,832 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 801 transitions. Word has length 20 [2022-02-16 13:49:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:08,833 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 801 transitions. [2022-02-16 13:49:08,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 801 transitions. [2022-02-16 13:49:08,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:08,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:08,833 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:08,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:09,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:09,042 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2111504300, now seen corresponding path program 114 times [2022-02-16 13:49:09,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:09,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918560293] [2022-02-16 13:49:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:09,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:09,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:09,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918560293] [2022-02-16 13:49:09,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918560293] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:09,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716908394] [2022-02-16 13:49:09,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:09,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:09,164 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:09,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-16 13:49:09,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:49:09,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:09,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:09,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:09,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:49:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:09,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:09,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:09,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:09,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716908394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:09,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:09,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:09,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644387871] [2022-02-16 13:49:09,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:09,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:09,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:09,830 INFO L87 Difference]: Start difference. First operand 287 states and 801 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:10,263 INFO L93 Difference]: Finished difference Result 350 states and 917 transitions. [2022-02-16 13:49:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:10,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:10,264 INFO L225 Difference]: With dead ends: 350 [2022-02-16 13:49:10,264 INFO L226 Difference]: Without dead ends: 350 [2022-02-16 13:49:10,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:49:10,264 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:10,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-16 13:49:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 283. [2022-02-16 13:49:10,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.797872340425532) internal successors, (789), 282 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 789 transitions. [2022-02-16 13:49:10,267 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 789 transitions. Word has length 20 [2022-02-16 13:49:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:10,268 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 789 transitions. [2022-02-16 13:49:10,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 789 transitions. [2022-02-16 13:49:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:10,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:10,269 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:10,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-16 13:49:10,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:10,479 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1252356738, now seen corresponding path program 115 times [2022-02-16 13:49:10,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:10,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172240682] [2022-02-16 13:49:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:10,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:10,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:10,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172240682] [2022-02-16 13:49:10,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172240682] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:10,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416629786] [2022-02-16 13:49:10,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:10,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:10,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:10,583 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:10,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-16 13:49:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:10,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:10,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:10,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:10,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:11,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:11,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:11,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416629786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:11,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:11,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:11,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436009030] [2022-02-16 13:49:11,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:11,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:11,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:11,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:11,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:11,217 INFO L87 Difference]: Start difference. First operand 283 states and 789 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:11,573 INFO L93 Difference]: Finished difference Result 316 states and 854 transitions. [2022-02-16 13:49:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:11,574 INFO L225 Difference]: With dead ends: 316 [2022-02-16 13:49:11,574 INFO L226 Difference]: Without dead ends: 313 [2022-02-16 13:49:11,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:11,574 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:11,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 77 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-16 13:49:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 284. [2022-02-16 13:49:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.795053003533569) internal successors, (791), 283 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 791 transitions. [2022-02-16 13:49:11,577 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 791 transitions. Word has length 20 [2022-02-16 13:49:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:11,578 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 791 transitions. [2022-02-16 13:49:11,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 791 transitions. [2022-02-16 13:49:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:11,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:11,578 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:11,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:11,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-02-16 13:49:11,787 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1044063430, now seen corresponding path program 116 times [2022-02-16 13:49:11,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:11,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883385235] [2022-02-16 13:49:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:11,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:11,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:11,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883385235] [2022-02-16 13:49:11,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883385235] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:11,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521041158] [2022-02-16 13:49:11,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:11,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:11,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:11,934 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:11,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-16 13:49:12,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:12,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:12,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:12,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:12,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:49:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:12,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:12,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:12,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:12,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521041158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:12,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:12,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:49:12,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656376713] [2022-02-16 13:49:12,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:12,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:12,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:12,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:12,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:12,494 INFO L87 Difference]: Start difference. First operand 284 states and 791 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:12,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:12,797 INFO L93 Difference]: Finished difference Result 329 states and 871 transitions. [2022-02-16 13:49:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:12,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:12,798 INFO L225 Difference]: With dead ends: 329 [2022-02-16 13:49:12,798 INFO L226 Difference]: Without dead ends: 327 [2022-02-16 13:49:12,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:12,798 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:12,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 95 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-16 13:49:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 287. [2022-02-16 13:49:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.7902097902097904) internal successors, (798), 286 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 798 transitions. [2022-02-16 13:49:12,802 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 798 transitions. Word has length 20 [2022-02-16 13:49:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:12,802 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 798 transitions. [2022-02-16 13:49:12,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 798 transitions. [2022-02-16 13:49:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:12,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:12,802 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:12,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:13,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:13,003 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash 71034366, now seen corresponding path program 117 times [2022-02-16 13:49:13,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:13,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422291195] [2022-02-16 13:49:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:13,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:13,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:13,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422291195] [2022-02-16 13:49:13,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422291195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:13,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691094792] [2022-02-16 13:49:13,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:13,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:13,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:13,112 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:13,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-16 13:49:13,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:13,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:13,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:13,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:13,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:49:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:13,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:13,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:13,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:13,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691094792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:13,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:13,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:49:13,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121304192] [2022-02-16 13:49:13,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:13,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:49:13,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:49:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:49:13,765 INFO L87 Difference]: Start difference. First operand 287 states and 798 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:14,003 INFO L93 Difference]: Finished difference Result 316 states and 857 transitions. [2022-02-16 13:49:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:14,004 INFO L225 Difference]: With dead ends: 316 [2022-02-16 13:49:14,004 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:49:14,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:14,004 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:14,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 67 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:49:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 282. [2022-02-16 13:49:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.790035587188612) internal successors, (784), 281 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 784 transitions. [2022-02-16 13:49:14,007 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 784 transitions. Word has length 20 [2022-02-16 13:49:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:14,007 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 784 transitions. [2022-02-16 13:49:14,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 784 transitions. [2022-02-16 13:49:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:14,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:14,008 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:14,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:14,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:14,224 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:14,224 INFO L85 PathProgramCache]: Analyzing trace with hash -644685088, now seen corresponding path program 118 times [2022-02-16 13:49:14,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:14,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558190064] [2022-02-16 13:49:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:14,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:14,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:14,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558190064] [2022-02-16 13:49:14,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558190064] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:14,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350618767] [2022-02-16 13:49:14,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:14,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:14,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:14,362 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:14,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-16 13:49:14,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:14,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:14,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:14,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:14,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:14,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:14,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:14,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350618767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:14,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:14,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:14,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299050974] [2022-02-16 13:49:14,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:14,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:14,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:14,808 INFO L87 Difference]: Start difference. First operand 282 states and 784 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:14,966 INFO L93 Difference]: Finished difference Result 373 states and 962 transitions. [2022-02-16 13:49:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:14,967 INFO L225 Difference]: With dead ends: 373 [2022-02-16 13:49:14,967 INFO L226 Difference]: Without dead ends: 373 [2022-02-16 13:49:14,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:14,968 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:14,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 117 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-02-16 13:49:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 288. [2022-02-16 13:49:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.7874564459930316) internal successors, (800), 287 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 800 transitions. [2022-02-16 13:49:14,971 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 800 transitions. Word has length 20 [2022-02-16 13:49:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:14,971 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 800 transitions. [2022-02-16 13:49:14,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 800 transitions. [2022-02-16 13:49:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:14,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:14,972 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:14,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:15,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-02-16 13:49:15,172 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:15,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1479414236, now seen corresponding path program 119 times [2022-02-16 13:49:15,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:15,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543839854] [2022-02-16 13:49:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:15,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:15,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:15,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543839854] [2022-02-16 13:49:15,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543839854] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:15,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955762522] [2022-02-16 13:49:15,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:15,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:15,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:15,241 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:15,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-16 13:49:15,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:49:15,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:15,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:15,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:15,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:15,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:15,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955762522] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:15,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:15,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:15,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685634433] [2022-02-16 13:49:15,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:15,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:15,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:15,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:15,658 INFO L87 Difference]: Start difference. First operand 288 states and 800 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:15,877 INFO L93 Difference]: Finished difference Result 390 states and 985 transitions. [2022-02-16 13:49:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:15,877 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:15,878 INFO L225 Difference]: With dead ends: 390 [2022-02-16 13:49:15,878 INFO L226 Difference]: Without dead ends: 390 [2022-02-16 13:49:15,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:15,878 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:15,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 144 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-16 13:49:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 290. [2022-02-16 13:49:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.792387543252595) internal successors, (807), 289 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 807 transitions. [2022-02-16 13:49:15,882 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 807 transitions. Word has length 20 [2022-02-16 13:49:15,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:15,882 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 807 transitions. [2022-02-16 13:49:15,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 807 transitions. [2022-02-16 13:49:15,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:15,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:15,882 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:15,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-16 13:49:16,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:16,099 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:16,100 INFO L85 PathProgramCache]: Analyzing trace with hash -764881380, now seen corresponding path program 120 times [2022-02-16 13:49:16,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:16,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964941244] [2022-02-16 13:49:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:16,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:16,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:16,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964941244] [2022-02-16 13:49:16,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964941244] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:16,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804840096] [2022-02-16 13:49:16,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:16,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:16,185 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:16,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-16 13:49:16,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:49:16,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:16,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:16,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:16,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:16,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:16,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:16,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804840096] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:16,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:16,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:49:16,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329691514] [2022-02-16 13:49:16,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:16,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:49:16,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:16,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:49:16,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:49:16,575 INFO L87 Difference]: Start difference. First operand 290 states and 807 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:16,720 INFO L93 Difference]: Finished difference Result 375 states and 964 transitions. [2022-02-16 13:49:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:16,721 INFO L225 Difference]: With dead ends: 375 [2022-02-16 13:49:16,721 INFO L226 Difference]: Without dead ends: 374 [2022-02-16 13:49:16,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:16,722 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:16,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 142 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-16 13:49:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 284. [2022-02-16 13:49:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.802120141342756) internal successors, (793), 283 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 793 transitions. [2022-02-16 13:49:16,727 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 793 transitions. Word has length 20 [2022-02-16 13:49:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:16,727 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 793 transitions. [2022-02-16 13:49:16,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 793 transitions. [2022-02-16 13:49:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:16,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:16,728 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:16,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:16,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:16,943 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1897318111, now seen corresponding path program 121 times [2022-02-16 13:49:16,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:16,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903773455] [2022-02-16 13:49:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:16,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:16,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:16,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903773455] [2022-02-16 13:49:16,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903773455] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:16,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189731543] [2022-02-16 13:49:16,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:16,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:16,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:17,020 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:17,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-16 13:49:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:17,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:49:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:17,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:17,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:17,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:17,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189731543] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:17,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:17,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-02-16 13:49:17,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598069793] [2022-02-16 13:49:17,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:17,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:49:17,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:17,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:49:17,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:49:17,330 INFO L87 Difference]: Start difference. First operand 284 states and 793 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:17,486 INFO L93 Difference]: Finished difference Result 335 states and 872 transitions. [2022-02-16 13:49:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:17,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:17,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:17,487 INFO L225 Difference]: With dead ends: 335 [2022-02-16 13:49:17,487 INFO L226 Difference]: Without dead ends: 306 [2022-02-16 13:49:17,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:17,487 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:17,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 72 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-02-16 13:49:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 252. [2022-02-16 13:49:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.741035856573705) internal successors, (688), 251 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 688 transitions. [2022-02-16 13:49:17,490 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 688 transitions. Word has length 20 [2022-02-16 13:49:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:17,490 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 688 transitions. [2022-02-16 13:49:17,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:17,490 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 688 transitions. [2022-02-16 13:49:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:17,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:17,503 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:17,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-16 13:49:17,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-16 13:49:17,703 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1517440164, now seen corresponding path program 122 times [2022-02-16 13:49:17,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:17,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925902082] [2022-02-16 13:49:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:17,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:17,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:17,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925902082] [2022-02-16 13:49:17,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925902082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:17,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6706544] [2022-02-16 13:49:17,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:17,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:17,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:17,791 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:17,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-16 13:49:17,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:17,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:17,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:17,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:18,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:18,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:18,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:18,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6706544] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:18,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:18,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:18,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404385547] [2022-02-16 13:49:18,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:18,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:18,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:18,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:18,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:18,143 INFO L87 Difference]: Start difference. First operand 252 states and 688 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:18,286 INFO L93 Difference]: Finished difference Result 395 states and 972 transitions. [2022-02-16 13:49:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:18,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:18,287 INFO L225 Difference]: With dead ends: 395 [2022-02-16 13:49:18,287 INFO L226 Difference]: Without dead ends: 395 [2022-02-16 13:49:18,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:18,288 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 173 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:18,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 123 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-16 13:49:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 253. [2022-02-16 13:49:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.75) internal successors, (693), 252 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 693 transitions. [2022-02-16 13:49:18,291 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 693 transitions. Word has length 20 [2022-02-16 13:49:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:18,291 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 693 transitions. [2022-02-16 13:49:18,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 693 transitions. [2022-02-16 13:49:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:18,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:18,292 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:18,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:18,507 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1007663712, now seen corresponding path program 123 times [2022-02-16 13:49:18,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:18,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984766413] [2022-02-16 13:49:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:18,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:18,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:18,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984766413] [2022-02-16 13:49:18,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984766413] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:18,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391422283] [2022-02-16 13:49:18,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:18,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:18,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:18,606 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:18,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-16 13:49:18,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:49:18,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:18,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:18,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:18,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:18,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:19,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:19,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:19,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391422283] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:19,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:19,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:19,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719621277] [2022-02-16 13:49:19,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:19,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:19,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:19,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:19,048 INFO L87 Difference]: Start difference. First operand 253 states and 693 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:19,205 INFO L93 Difference]: Finished difference Result 399 states and 984 transitions. [2022-02-16 13:49:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:19,206 INFO L225 Difference]: With dead ends: 399 [2022-02-16 13:49:19,206 INFO L226 Difference]: Without dead ends: 399 [2022-02-16 13:49:19,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:19,206 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 161 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:19,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 132 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-16 13:49:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 255. [2022-02-16 13:49:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.763779527559055) internal successors, (702), 254 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 702 transitions. [2022-02-16 13:49:19,209 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 702 transitions. Word has length 20 [2022-02-16 13:49:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:19,209 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 702 transitions. [2022-02-16 13:49:19,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 702 transitions. [2022-02-16 13:49:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:19,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:19,210 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:19,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-02-16 13:49:19,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-16 13:49:19,426 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash 812230884, now seen corresponding path program 124 times [2022-02-16 13:49:19,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:19,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002823226] [2022-02-16 13:49:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:19,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:19,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:19,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002823226] [2022-02-16 13:49:19,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002823226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:19,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90014963] [2022-02-16 13:49:19,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:19,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:19,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:19,555 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:19,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-16 13:49:19,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:19,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:19,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:19,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:19,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:20,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:20,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:20,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90014963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:20,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:20,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:20,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801009707] [2022-02-16 13:49:20,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:20,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:20,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:20,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:20,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:20,048 INFO L87 Difference]: Start difference. First operand 255 states and 702 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:20,270 INFO L93 Difference]: Finished difference Result 384 states and 964 transitions. [2022-02-16 13:49:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:20,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:20,271 INFO L225 Difference]: With dead ends: 384 [2022-02-16 13:49:20,271 INFO L226 Difference]: Without dead ends: 384 [2022-02-16 13:49:20,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:20,271 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:20,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 128 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-02-16 13:49:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 252. [2022-02-16 13:49:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.741035856573705) internal successors, (688), 251 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 688 transitions. [2022-02-16 13:49:20,274 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 688 transitions. Word has length 20 [2022-02-16 13:49:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:20,274 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 688 transitions. [2022-02-16 13:49:20,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 688 transitions. [2022-02-16 13:49:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:20,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:20,275 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:20,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-02-16 13:49:20,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-16 13:49:20,485 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash 898388776, now seen corresponding path program 125 times [2022-02-16 13:49:20,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:20,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678208250] [2022-02-16 13:49:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:20,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:20,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:20,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678208250] [2022-02-16 13:49:20,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678208250] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:20,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541679919] [2022-02-16 13:49:20,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:20,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:20,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:20,573 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:20,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-16 13:49:20,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:49:20,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:20,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:20,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:20,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:21,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:21,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:21,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541679919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:21,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:21,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:21,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241872803] [2022-02-16 13:49:21,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:21,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:21,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:21,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:21,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:21,099 INFO L87 Difference]: Start difference. First operand 252 states and 688 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:21,424 INFO L93 Difference]: Finished difference Result 431 states and 1013 transitions. [2022-02-16 13:49:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:21,424 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:21,424 INFO L225 Difference]: With dead ends: 431 [2022-02-16 13:49:21,424 INFO L226 Difference]: Without dead ends: 431 [2022-02-16 13:49:21,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:49:21,425 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 324 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:21,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 149 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-16 13:49:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 258. [2022-02-16 13:49:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.754863813229572) internal successors, (708), 257 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 708 transitions. [2022-02-16 13:49:21,428 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 708 transitions. Word has length 20 [2022-02-16 13:49:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:21,428 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 708 transitions. [2022-02-16 13:49:21,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 708 transitions. [2022-02-16 13:49:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:21,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:21,429 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:21,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:21,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-16 13:49:21,629 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:21,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1612921632, now seen corresponding path program 126 times [2022-02-16 13:49:21,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:21,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601100745] [2022-02-16 13:49:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:21,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:21,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:21,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601100745] [2022-02-16 13:49:21,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601100745] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:21,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053540394] [2022-02-16 13:49:21,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:21,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:21,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:21,741 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:21,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-16 13:49:21,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:49:21,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:21,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:22,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:22,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:22,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:22,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053540394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:22,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:22,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:22,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766479276] [2022-02-16 13:49:22,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:22,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:22,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:22,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:22,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:22,255 INFO L87 Difference]: Start difference. First operand 258 states and 708 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:22,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:22,502 INFO L93 Difference]: Finished difference Result 407 states and 983 transitions. [2022-02-16 13:49:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:22,503 INFO L225 Difference]: With dead ends: 407 [2022-02-16 13:49:22,503 INFO L226 Difference]: Without dead ends: 406 [2022-02-16 13:49:22,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:22,504 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:22,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 145 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-02-16 13:49:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 255. [2022-02-16 13:49:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.7559055118110236) internal successors, (700), 254 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 700 transitions. [2022-02-16 13:49:22,507 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 700 transitions. Word has length 20 [2022-02-16 13:49:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:22,507 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 700 transitions. [2022-02-16 13:49:22,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 700 transitions. [2022-02-16 13:49:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:22,507 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:22,507 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:22,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:22,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:22,715 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:22,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1106682084, now seen corresponding path program 127 times [2022-02-16 13:49:22,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:22,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503178151] [2022-02-16 13:49:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:22,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:22,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:22,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503178151] [2022-02-16 13:49:22,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503178151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:22,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834931840] [2022-02-16 13:49:22,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:22,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:22,806 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:22,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-16 13:49:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:22,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:22,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:22,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:23,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:23,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:23,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:23,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834931840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:23,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:23,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:23,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27086680] [2022-02-16 13:49:23,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:23,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:23,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:23,319 INFO L87 Difference]: Start difference. First operand 255 states and 700 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:23,557 INFO L93 Difference]: Finished difference Result 428 states and 1028 transitions. [2022-02-16 13:49:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:23,558 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:23,558 INFO L225 Difference]: With dead ends: 428 [2022-02-16 13:49:23,559 INFO L226 Difference]: Without dead ends: 428 [2022-02-16 13:49:23,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:23,559 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 144 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:23,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 130 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-16 13:49:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 257. [2022-02-16 13:49:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.76953125) internal successors, (709), 256 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 709 transitions. [2022-02-16 13:49:23,562 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 709 transitions. Word has length 20 [2022-02-16 13:49:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:23,562 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 709 transitions. [2022-02-16 13:49:23,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 709 transitions. [2022-02-16 13:49:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:23,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:23,563 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:23,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:23,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:23,763 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1796404008, now seen corresponding path program 128 times [2022-02-16 13:49:23,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:23,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636373195] [2022-02-16 13:49:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:23,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:23,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:23,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636373195] [2022-02-16 13:49:23,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636373195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:23,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477574306] [2022-02-16 13:49:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:23,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:23,869 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:23,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-16 13:49:23,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:23,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:23,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:23,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:24,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:24,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:24,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:24,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:24,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477574306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:24,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:24,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:49:24,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797145646] [2022-02-16 13:49:24,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:24,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:49:24,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:49:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:49:24,267 INFO L87 Difference]: Start difference. First operand 257 states and 709 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:24,421 INFO L93 Difference]: Finished difference Result 414 states and 1013 transitions. [2022-02-16 13:49:24,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:24,421 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:24,421 INFO L225 Difference]: With dead ends: 414 [2022-02-16 13:49:24,421 INFO L226 Difference]: Without dead ends: 414 [2022-02-16 13:49:24,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:49:24,422 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:24,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 116 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-02-16 13:49:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 255. [2022-02-16 13:49:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.7559055118110236) internal successors, (700), 254 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 700 transitions. [2022-02-16 13:49:24,425 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 700 transitions. Word has length 20 [2022-02-16 13:49:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:24,425 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 700 transitions. [2022-02-16 13:49:24,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 700 transitions. [2022-02-16 13:49:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:24,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:24,426 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:24,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-02-16 13:49:24,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-16 13:49:24,635 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:24,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash -845771236, now seen corresponding path program 129 times [2022-02-16 13:49:24,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:24,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385291689] [2022-02-16 13:49:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:24,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:24,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:24,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385291689] [2022-02-16 13:49:24,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385291689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:24,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353510600] [2022-02-16 13:49:24,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:24,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:24,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:24,760 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:24,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-16 13:49:24,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:24,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:24,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:24,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:24,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:25,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:25,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:25,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:25,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353510600] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:25,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:25,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:25,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020250800] [2022-02-16 13:49:25,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:25,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:25,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:25,205 INFO L87 Difference]: Start difference. First operand 255 states and 700 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:25,393 INFO L93 Difference]: Finished difference Result 390 states and 958 transitions. [2022-02-16 13:49:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:25,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:25,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:25,394 INFO L225 Difference]: With dead ends: 390 [2022-02-16 13:49:25,394 INFO L226 Difference]: Without dead ends: 388 [2022-02-16 13:49:25,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:25,394 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 166 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:25,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 127 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-16 13:49:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 258. [2022-02-16 13:49:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.7509727626459144) internal successors, (707), 257 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 707 transitions. [2022-02-16 13:49:25,398 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 707 transitions. Word has length 20 [2022-02-16 13:49:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:25,398 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 707 transitions. [2022-02-16 13:49:25,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 707 transitions. [2022-02-16 13:49:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:25,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:25,398 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:25,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-02-16 13:49:25,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-02-16 13:49:25,599 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash 269326560, now seen corresponding path program 130 times [2022-02-16 13:49:25,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:25,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332272490] [2022-02-16 13:49:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:25,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:25,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:25,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332272490] [2022-02-16 13:49:25,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332272490] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:25,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465348527] [2022-02-16 13:49:25,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:25,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:25,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:25,717 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:25,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-16 13:49:25,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:25,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:25,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:26,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:26,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:26,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:26,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465348527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:26,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:26,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:26,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620384395] [2022-02-16 13:49:26,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:26,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:26,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:26,265 INFO L87 Difference]: Start difference. First operand 258 states and 707 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:26,580 INFO L93 Difference]: Finished difference Result 392 states and 964 transitions. [2022-02-16 13:49:26,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:49:26,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:26,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:26,581 INFO L225 Difference]: With dead ends: 392 [2022-02-16 13:49:26,581 INFO L226 Difference]: Without dead ends: 392 [2022-02-16 13:49:26,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:26,581 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:26,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 191 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:26,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-16 13:49:26,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 255. [2022-02-16 13:49:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.7401574803149606) internal successors, (696), 254 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 696 transitions. [2022-02-16 13:49:26,584 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 696 transitions. Word has length 20 [2022-02-16 13:49:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:26,585 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 696 transitions. [2022-02-16 13:49:26,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 696 transitions. [2022-02-16 13:49:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:26,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:26,585 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:26,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:26,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:26,792 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:26,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:26,792 INFO L85 PathProgramCache]: Analyzing trace with hash 880973310, now seen corresponding path program 131 times [2022-02-16 13:49:26,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:26,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339088460] [2022-02-16 13:49:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:26,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:26,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:26,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339088460] [2022-02-16 13:49:26,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339088460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:26,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220104932] [2022-02-16 13:49:26,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:26,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:26,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:26,882 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:26,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-16 13:49:26,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:49:26,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:26,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:27,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:49:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:27,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:27,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:27,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:27,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220104932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:27,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:27,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:27,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167169439] [2022-02-16 13:49:27,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:27,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:27,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:27,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:27,330 INFO L87 Difference]: Start difference. First operand 255 states and 696 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:27,582 INFO L93 Difference]: Finished difference Result 352 states and 895 transitions. [2022-02-16 13:49:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:27,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:27,583 INFO L225 Difference]: With dead ends: 352 [2022-02-16 13:49:27,583 INFO L226 Difference]: Without dead ends: 352 [2022-02-16 13:49:27,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:27,583 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:27,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 129 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-16 13:49:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 255. [2022-02-16 13:49:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.7401574803149606) internal successors, (696), 254 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 696 transitions. [2022-02-16 13:49:27,587 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 696 transitions. Word has length 20 [2022-02-16 13:49:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:27,587 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 696 transitions. [2022-02-16 13:49:27,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 696 transitions. [2022-02-16 13:49:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:27,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:27,587 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:27,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:27,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:27,788 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:27,788 INFO L85 PathProgramCache]: Analyzing trace with hash 371196858, now seen corresponding path program 132 times [2022-02-16 13:49:27,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:27,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469156592] [2022-02-16 13:49:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:27,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:27,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:27,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469156592] [2022-02-16 13:49:27,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469156592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:27,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640795973] [2022-02-16 13:49:27,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:27,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:27,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:27,888 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:27,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-16 13:49:27,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:49:27,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:27,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:28,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:49:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:28,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:28,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:28,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:28,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640795973] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:28,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:28,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:28,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578287807] [2022-02-16 13:49:28,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:28,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:28,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:28,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:28,374 INFO L87 Difference]: Start difference. First operand 255 states and 696 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:28,608 INFO L93 Difference]: Finished difference Result 363 states and 908 transitions. [2022-02-16 13:49:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:28,608 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:28,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:28,608 INFO L225 Difference]: With dead ends: 363 [2022-02-16 13:49:28,608 INFO L226 Difference]: Without dead ends: 363 [2022-02-16 13:49:28,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:28,609 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:28,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 154 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-02-16 13:49:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 256. [2022-02-16 13:49:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.7450980392156863) internal successors, (700), 255 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 700 transitions. [2022-02-16 13:49:28,612 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 700 transitions. Word has length 20 [2022-02-16 13:49:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:28,612 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 700 transitions. [2022-02-16 13:49:28,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 700 transitions. [2022-02-16 13:49:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:28,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:28,612 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:28,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-02-16 13:49:28,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-02-16 13:49:28,817 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:28,818 INFO L85 PathProgramCache]: Analyzing trace with hash 175764030, now seen corresponding path program 133 times [2022-02-16 13:49:28,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:28,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410079809] [2022-02-16 13:49:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:28,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:28,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:28,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410079809] [2022-02-16 13:49:28,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410079809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:28,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389129590] [2022-02-16 13:49:28,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:28,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:28,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:28,913 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:28,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-16 13:49:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:29,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:29,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:49:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:29,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:29,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:29,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:29,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389129590] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:29,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:29,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:29,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178492861] [2022-02-16 13:49:29,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:29,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:29,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:29,284 INFO L87 Difference]: Start difference. First operand 256 states and 700 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:29,462 INFO L93 Difference]: Finished difference Result 342 states and 881 transitions. [2022-02-16 13:49:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:29,462 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:29,462 INFO L225 Difference]: With dead ends: 342 [2022-02-16 13:49:29,462 INFO L226 Difference]: Without dead ends: 342 [2022-02-16 13:49:29,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:29,463 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:29,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 105 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-02-16 13:49:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 251. [2022-02-16 13:49:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.724) internal successors, (681), 250 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 681 transitions. [2022-02-16 13:49:29,466 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 681 transitions. Word has length 20 [2022-02-16 13:49:29,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:29,466 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 681 transitions. [2022-02-16 13:49:29,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 681 transitions. [2022-02-16 13:49:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:29,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:29,466 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:29,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:29,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-16 13:49:29,679 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1291202780, now seen corresponding path program 134 times [2022-02-16 13:49:29,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:29,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418762530] [2022-02-16 13:49:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:29,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:29,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:29,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418762530] [2022-02-16 13:49:29,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418762530] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:29,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248390303] [2022-02-16 13:49:29,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:29,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:29,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:29,756 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:29,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-16 13:49:29,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:29,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:29,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:29,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:29,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:49:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:30,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:30,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:30,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:30,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248390303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:30,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:30,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:30,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885964095] [2022-02-16 13:49:30,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:30,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:30,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:30,220 INFO L87 Difference]: Start difference. First operand 251 states and 681 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:30,392 INFO L93 Difference]: Finished difference Result 315 states and 810 transitions. [2022-02-16 13:49:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:30,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:30,393 INFO L225 Difference]: With dead ends: 315 [2022-02-16 13:49:30,393 INFO L226 Difference]: Without dead ends: 315 [2022-02-16 13:49:30,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:30,393 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:30,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 95 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-02-16 13:49:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 255. [2022-02-16 13:49:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.7440944881889764) internal successors, (697), 254 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 697 transitions. [2022-02-16 13:49:30,396 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 697 transitions. Word has length 20 [2022-02-16 13:49:30,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:30,396 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 697 transitions. [2022-02-16 13:49:30,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 697 transitions. [2022-02-16 13:49:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:30,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:30,397 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:30,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:30,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-16 13:49:30,599 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1486635608, now seen corresponding path program 135 times [2022-02-16 13:49:30,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:30,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620842520] [2022-02-16 13:49:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:30,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:30,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:30,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620842520] [2022-02-16 13:49:30,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620842520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:30,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629173704] [2022-02-16 13:49:30,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:30,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:30,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:30,706 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:30,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-16 13:49:30,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:49:30,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:30,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:30,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:49:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:30,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:31,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:31,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:31,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629173704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:31,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:31,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:31,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476378136] [2022-02-16 13:49:31,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:31,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:31,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:31,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:31,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:31,151 INFO L87 Difference]: Start difference. First operand 255 states and 697 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:31,383 INFO L93 Difference]: Finished difference Result 318 states and 815 transitions. [2022-02-16 13:49:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:49:31,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:31,384 INFO L225 Difference]: With dead ends: 318 [2022-02-16 13:49:31,384 INFO L226 Difference]: Without dead ends: 318 [2022-02-16 13:49:31,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:31,385 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:31,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 128 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-16 13:49:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 255. [2022-02-16 13:49:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.7244094488188977) internal successors, (692), 254 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 692 transitions. [2022-02-16 13:49:31,388 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 692 transitions. Word has length 20 [2022-02-16 13:49:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:31,388 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 692 transitions. [2022-02-16 13:49:31,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 692 transitions. [2022-02-16 13:49:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:31,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:31,388 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:31,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-02-16 13:49:31,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-16 13:49:31,589 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:31,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1484009832, now seen corresponding path program 136 times [2022-02-16 13:49:31,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:31,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802821962] [2022-02-16 13:49:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:31,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:31,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:31,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802821962] [2022-02-16 13:49:31,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802821962] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:31,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477838609] [2022-02-16 13:49:31,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:31,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:31,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:31,666 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:31,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-16 13:49:31,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:31,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:31,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:31,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:31,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:32,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:32,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:32,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477838609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:32,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:32,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:32,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671194436] [2022-02-16 13:49:32,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:32,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:32,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:32,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:32,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:32,083 INFO L87 Difference]: Start difference. First operand 255 states and 692 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:32,269 INFO L93 Difference]: Finished difference Result 293 states and 772 transitions. [2022-02-16 13:49:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:32,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:32,270 INFO L225 Difference]: With dead ends: 293 [2022-02-16 13:49:32,270 INFO L226 Difference]: Without dead ends: 293 [2022-02-16 13:49:32,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:32,270 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:32,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 85 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:32,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-16 13:49:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 257. [2022-02-16 13:49:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.72265625) internal successors, (697), 256 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 697 transitions. [2022-02-16 13:49:32,273 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 697 transitions. Word has length 20 [2022-02-16 13:49:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:32,273 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 697 transitions. [2022-02-16 13:49:32,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 697 transitions. [2022-02-16 13:49:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:32,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:32,274 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:32,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:32,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:32,490 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:32,490 INFO L85 PathProgramCache]: Analyzing trace with hash -374544932, now seen corresponding path program 137 times [2022-02-16 13:49:32,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:32,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732144359] [2022-02-16 13:49:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:32,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:32,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:32,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732144359] [2022-02-16 13:49:32,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732144359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:32,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051984565] [2022-02-16 13:49:32,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:32,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:32,604 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:32,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-16 13:49:32,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:49:32,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:32,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:32,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:32,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:49:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:32,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:33,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:33,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:33,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051984565] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:33,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:33,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:33,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681836630] [2022-02-16 13:49:33,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:33,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:33,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:33,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:33,122 INFO L87 Difference]: Start difference. First operand 257 states and 697 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:33,386 INFO L93 Difference]: Finished difference Result 374 states and 907 transitions. [2022-02-16 13:49:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:33,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:33,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:33,387 INFO L225 Difference]: With dead ends: 374 [2022-02-16 13:49:33,387 INFO L226 Difference]: Without dead ends: 374 [2022-02-16 13:49:33,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:49:33,387 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:33,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 138 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-16 13:49:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 265. [2022-02-16 13:49:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.75) internal successors, (726), 264 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 726 transitions. [2022-02-16 13:49:33,407 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 726 transitions. Word has length 20 [2022-02-16 13:49:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:33,407 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 726 transitions. [2022-02-16 13:49:33,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 726 transitions. [2022-02-16 13:49:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:33,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:33,408 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:33,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:33,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-02-16 13:49:33,624 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash 339987924, now seen corresponding path program 138 times [2022-02-16 13:49:33,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:33,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454343860] [2022-02-16 13:49:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:33,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:33,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:33,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454343860] [2022-02-16 13:49:33,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454343860] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:33,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510569540] [2022-02-16 13:49:33,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:33,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:33,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:33,744 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:33,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-16 13:49:33,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:49:33,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:33,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:33,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:34,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:49:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:34,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:34,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:34,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:34,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510569540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:34,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:34,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:34,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581318350] [2022-02-16 13:49:34,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:34,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:34,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:34,323 INFO L87 Difference]: Start difference. First operand 265 states and 726 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:34,550 INFO L93 Difference]: Finished difference Result 350 states and 877 transitions. [2022-02-16 13:49:34,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:34,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:34,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:34,551 INFO L225 Difference]: With dead ends: 350 [2022-02-16 13:49:34,551 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:49:34,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:34,551 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 130 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:34,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 110 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:49:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 262. [2022-02-16 13:49:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7509578544061304) internal successors, (718), 261 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 718 transitions. [2022-02-16 13:49:34,554 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 718 transitions. Word has length 20 [2022-02-16 13:49:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:34,554 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 718 transitions. [2022-02-16 13:49:34,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 718 transitions. [2022-02-16 13:49:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:34,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:34,555 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:34,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-02-16 13:49:34,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-02-16 13:49:34,767 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:34,767 INFO L85 PathProgramCache]: Analyzing trace with hash -166251624, now seen corresponding path program 139 times [2022-02-16 13:49:34,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:34,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36091845] [2022-02-16 13:49:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:34,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:34,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:34,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36091845] [2022-02-16 13:49:34,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36091845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:34,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139103054] [2022-02-16 13:49:34,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:34,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:34,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:34,881 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:34,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-16 13:49:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:35,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:35,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:35,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:49:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:35,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:35,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:35,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:35,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139103054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:35,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:35,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:35,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660782468] [2022-02-16 13:49:35,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:35,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:35,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:35,516 INFO L87 Difference]: Start difference. First operand 262 states and 718 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:35,856 INFO L93 Difference]: Finished difference Result 387 states and 944 transitions. [2022-02-16 13:49:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:35,856 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:35,857 INFO L225 Difference]: With dead ends: 387 [2022-02-16 13:49:35,857 INFO L226 Difference]: Without dead ends: 387 [2022-02-16 13:49:35,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:35,857 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 112 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:35,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 153 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-16 13:49:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 264. [2022-02-16 13:49:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.76425855513308) internal successors, (727), 263 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 727 transitions. [2022-02-16 13:49:35,860 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 727 transitions. Word has length 20 [2022-02-16 13:49:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:35,861 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 727 transitions. [2022-02-16 13:49:35,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 727 transitions. [2022-02-16 13:49:35,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:35,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:35,861 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:35,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-02-16 13:49:36,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:36,062 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash 523470300, now seen corresponding path program 140 times [2022-02-16 13:49:36,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:36,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960297470] [2022-02-16 13:49:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:36,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:36,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:36,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960297470] [2022-02-16 13:49:36,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960297470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:36,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956075386] [2022-02-16 13:49:36,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:36,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:36,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:36,186 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:36,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-16 13:49:36,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:36,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:49:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:36,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:36,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:36,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:36,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956075386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:36,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:36,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:36,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25106596] [2022-02-16 13:49:36,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:36,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:36,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:36,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:36,751 INFO L87 Difference]: Start difference. First operand 264 states and 727 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:37,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:37,096 INFO L93 Difference]: Finished difference Result 373 states and 929 transitions. [2022-02-16 13:49:37,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:37,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:37,096 INFO L225 Difference]: With dead ends: 373 [2022-02-16 13:49:37,097 INFO L226 Difference]: Without dead ends: 373 [2022-02-16 13:49:37,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:37,097 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:37,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 166 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-02-16 13:49:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 262. [2022-02-16 13:49:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7509578544061304) internal successors, (718), 261 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 718 transitions. [2022-02-16 13:49:37,100 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 718 transitions. Word has length 20 [2022-02-16 13:49:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:37,100 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 718 transitions. [2022-02-16 13:49:37,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 718 transitions. [2022-02-16 13:49:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:37,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:37,101 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:37,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:37,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:37,305 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:37,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2118704944, now seen corresponding path program 141 times [2022-02-16 13:49:37,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:37,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660870740] [2022-02-16 13:49:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:37,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:37,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:37,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660870740] [2022-02-16 13:49:37,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660870740] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:37,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102270362] [2022-02-16 13:49:37,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:37,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:37,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:37,416 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:37,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-16 13:49:37,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:37,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:37,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:37,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:49:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:37,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:37,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:37,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:37,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102270362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:37,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:37,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:37,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780226756] [2022-02-16 13:49:37,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:37,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:37,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:37,956 INFO L87 Difference]: Start difference. First operand 262 states and 718 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:38,287 INFO L93 Difference]: Finished difference Result 370 states and 904 transitions. [2022-02-16 13:49:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:38,288 INFO L225 Difference]: With dead ends: 370 [2022-02-16 13:49:38,288 INFO L226 Difference]: Without dead ends: 368 [2022-02-16 13:49:38,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:38,288 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:38,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 151 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-16 13:49:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 265. [2022-02-16 13:49:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.746212121212121) internal successors, (725), 264 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 725 transitions. [2022-02-16 13:49:38,292 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 725 transitions. Word has length 20 [2022-02-16 13:49:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:38,292 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 725 transitions. [2022-02-16 13:49:38,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 725 transitions. [2022-02-16 13:49:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:38,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:38,292 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:38,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:38,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:38,493 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1003607148, now seen corresponding path program 142 times [2022-02-16 13:49:38,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:38,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630224725] [2022-02-16 13:49:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:38,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:38,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:38,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630224725] [2022-02-16 13:49:38,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630224725] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:38,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433510062] [2022-02-16 13:49:38,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:38,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:38,652 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:38,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-16 13:49:38,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:38,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:38,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:38,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:38,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:49:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:38,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:39,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:39,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:39,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433510062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:39,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:39,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:39,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452594979] [2022-02-16 13:49:39,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:39,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:39,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:39,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:39,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:39,208 INFO L87 Difference]: Start difference. First operand 265 states and 725 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:39,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:39,521 INFO L93 Difference]: Finished difference Result 372 states and 910 transitions. [2022-02-16 13:49:39,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:49:39,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:39,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:39,521 INFO L225 Difference]: With dead ends: 372 [2022-02-16 13:49:39,522 INFO L226 Difference]: Without dead ends: 372 [2022-02-16 13:49:39,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:49:39,522 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 143 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:39,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 152 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-16 13:49:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 263. [2022-02-16 13:49:39,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7404580152671754) internal successors, (718), 262 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 718 transitions. [2022-02-16 13:49:39,525 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 718 transitions. Word has length 20 [2022-02-16 13:49:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:39,525 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 718 transitions. [2022-02-16 13:49:39,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 718 transitions. [2022-02-16 13:49:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:39,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:39,526 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:39,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:39,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-02-16 13:49:39,735 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:39,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1433708802, now seen corresponding path program 143 times [2022-02-16 13:49:39,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:39,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602658511] [2022-02-16 13:49:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:39,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:39,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:39,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602658511] [2022-02-16 13:49:39,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602658511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:39,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111934439] [2022-02-16 13:49:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:39,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:39,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:39,833 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:39,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-16 13:49:39,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:49:39,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:39,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:40,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:49:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:40,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:40,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:40,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:40,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111934439] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:40,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:40,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:40,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950696068] [2022-02-16 13:49:40,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:40,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:40,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:40,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:40,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:40,376 INFO L87 Difference]: Start difference. First operand 263 states and 718 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:40,582 INFO L93 Difference]: Finished difference Result 341 states and 868 transitions. [2022-02-16 13:49:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:40,583 INFO L225 Difference]: With dead ends: 341 [2022-02-16 13:49:40,583 INFO L226 Difference]: Without dead ends: 341 [2022-02-16 13:49:40,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:40,583 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:40,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 102 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:40,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-02-16 13:49:40,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 264. [2022-02-16 13:49:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7452471482889735) internal successors, (722), 263 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 722 transitions. [2022-02-16 13:49:40,586 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 722 transitions. Word has length 20 [2022-02-16 13:49:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:40,586 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 722 transitions. [2022-02-16 13:49:40,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:40,586 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 722 transitions. [2022-02-16 13:49:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:40,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:40,587 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:40,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-02-16 13:49:40,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-02-16 13:49:40,796 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash -743986878, now seen corresponding path program 144 times [2022-02-16 13:49:40,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:40,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846053423] [2022-02-16 13:49:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:40,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:40,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:40,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846053423] [2022-02-16 13:49:40,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846053423] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:40,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373849762] [2022-02-16 13:49:40,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:40,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:40,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:40,914 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:40,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-16 13:49:41,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:49:41,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:41,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:41,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:41,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-02-16 13:49:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:41,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:41,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:41,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:41,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373849762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:41,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:41,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:41,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602736495] [2022-02-16 13:49:41,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:41,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:41,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:41,585 INFO L87 Difference]: Start difference. First operand 264 states and 722 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:41,785 INFO L93 Difference]: Finished difference Result 339 states and 865 transitions. [2022-02-16 13:49:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:49:41,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:41,785 INFO L225 Difference]: With dead ends: 339 [2022-02-16 13:49:41,785 INFO L226 Difference]: Without dead ends: 339 [2022-02-16 13:49:41,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:41,786 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:41,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 106 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-16 13:49:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 260. [2022-02-16 13:49:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7335907335907335) internal successors, (708), 259 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 708 transitions. [2022-02-16 13:49:41,789 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 708 transitions. Word has length 20 [2022-02-16 13:49:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:41,789 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 708 transitions. [2022-02-16 13:49:41,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 708 transitions. [2022-02-16 13:49:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:41,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:41,789 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:41,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:42,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-02-16 13:49:42,006 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1039414060, now seen corresponding path program 145 times [2022-02-16 13:49:42,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:42,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940375601] [2022-02-16 13:49:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:42,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:42,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:42,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940375601] [2022-02-16 13:49:42,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940375601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:42,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56330800] [2022-02-16 13:49:42,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:42,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:42,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:42,176 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:42,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-16 13:49:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:42,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:42,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:42,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:42,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:42,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:42,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56330800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:42,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:42,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:42,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588863738] [2022-02-16 13:49:42,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:42,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:42,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:42,539 INFO L87 Difference]: Start difference. First operand 260 states and 708 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:42,708 INFO L93 Difference]: Finished difference Result 314 states and 819 transitions. [2022-02-16 13:49:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:42,709 INFO L225 Difference]: With dead ends: 314 [2022-02-16 13:49:42,709 INFO L226 Difference]: Without dead ends: 314 [2022-02-16 13:49:42,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:42,709 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:42,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 103 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-16 13:49:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 258. [2022-02-16 13:49:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.727626459143969) internal successors, (701), 257 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 701 transitions. [2022-02-16 13:49:42,712 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 701 transitions. Word has length 20 [2022-02-16 13:49:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:42,712 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 701 transitions. [2022-02-16 13:49:42,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 701 transitions. [2022-02-16 13:49:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:42,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:42,713 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:42,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-02-16 13:49:42,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:42,928 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:42,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1203623456, now seen corresponding path program 146 times [2022-02-16 13:49:42,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:42,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787367300] [2022-02-16 13:49:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:42,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:42,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:42,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787367300] [2022-02-16 13:49:42,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787367300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:42,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830267694] [2022-02-16 13:49:42,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:42,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:42,989 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:42,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-16 13:49:43,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:43,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:43,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:43,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:43,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:43,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:43,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830267694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:43,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:43,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:43,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143481475] [2022-02-16 13:49:43,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:43,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:43,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:43,380 INFO L87 Difference]: Start difference. First operand 258 states and 701 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:43,624 INFO L93 Difference]: Finished difference Result 313 states and 802 transitions. [2022-02-16 13:49:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:43,625 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:43,625 INFO L225 Difference]: With dead ends: 313 [2022-02-16 13:49:43,625 INFO L226 Difference]: Without dead ends: 311 [2022-02-16 13:49:43,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:49:43,625 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 107 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:43,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 92 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-16 13:49:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2022-02-16 13:49:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7213740458015265) internal successors, (713), 262 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 713 transitions. [2022-02-16 13:49:43,629 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 713 transitions. Word has length 20 [2022-02-16 13:49:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:43,629 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 713 transitions. [2022-02-16 13:49:43,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 713 transitions. [2022-02-16 13:49:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:43,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:43,629 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:43,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-16 13:49:43,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-16 13:49:43,843 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:43,843 INFO L85 PathProgramCache]: Analyzing trace with hash -88525660, now seen corresponding path program 147 times [2022-02-16 13:49:43,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:43,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731769574] [2022-02-16 13:49:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:43,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:43,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:43,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731769574] [2022-02-16 13:49:43,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731769574] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:43,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816595476] [2022-02-16 13:49:43,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:43,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:43,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:43,932 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:43,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-16 13:49:44,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:49:44,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:44,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:44,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:44,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:44,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:44,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:44,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816595476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:44,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:44,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:44,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006605779] [2022-02-16 13:49:44,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:44,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:44,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:44,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:44,395 INFO L87 Difference]: Start difference. First operand 263 states and 713 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:44,685 INFO L93 Difference]: Finished difference Result 315 states and 808 transitions. [2022-02-16 13:49:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:49:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:44,686 INFO L225 Difference]: With dead ends: 315 [2022-02-16 13:49:44,686 INFO L226 Difference]: Without dead ends: 315 [2022-02-16 13:49:44,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:44,687 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:44,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 107 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-02-16 13:49:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 262. [2022-02-16 13:49:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7241379310344827) internal successors, (711), 261 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 711 transitions. [2022-02-16 13:49:44,690 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 711 transitions. Word has length 20 [2022-02-16 13:49:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:44,690 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 711 transitions. [2022-02-16 13:49:44,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 711 transitions. [2022-02-16 13:49:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:44,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:44,690 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:44,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:44,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-02-16 13:49:44,899 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:44,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1394609278, now seen corresponding path program 148 times [2022-02-16 13:49:44,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:44,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234990355] [2022-02-16 13:49:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:44,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:44,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:44,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234990355] [2022-02-16 13:49:44,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234990355] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:44,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958063624] [2022-02-16 13:49:44,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:44,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:44,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:44,985 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:44,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-16 13:49:45,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:45,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:45,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:45,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:45,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:49:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:45,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958063624] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:45,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:45,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:45,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232282899] [2022-02-16 13:49:45,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:45,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:45,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:45,430 INFO L87 Difference]: Start difference. First operand 262 states and 711 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:45,649 INFO L93 Difference]: Finished difference Result 300 states and 789 transitions. [2022-02-16 13:49:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:45,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:45,650 INFO L225 Difference]: With dead ends: 300 [2022-02-16 13:49:45,650 INFO L226 Difference]: Without dead ends: 300 [2022-02-16 13:49:45,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:45,650 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:45,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 91 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-16 13:49:45,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 259. [2022-02-16 13:49:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.7248062015503876) internal successors, (703), 258 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 703 transitions. [2022-02-16 13:49:45,653 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 703 transitions. Word has length 20 [2022-02-16 13:49:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:45,653 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 703 transitions. [2022-02-16 13:49:45,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 703 transitions. [2022-02-16 13:49:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:45,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:45,654 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:45,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:45,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:45,861 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:45,861 INFO L85 PathProgramCache]: Analyzing trace with hash -155839324, now seen corresponding path program 149 times [2022-02-16 13:49:45,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:45,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368186541] [2022-02-16 13:49:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:45,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:45,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:45,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368186541] [2022-02-16 13:49:45,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368186541] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:45,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349387700] [2022-02-16 13:49:45,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:45,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:45,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:45,978 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:45,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-16 13:49:46,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:46,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:46,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:49:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:46,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:46,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:46,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:46,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349387700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:46,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:46,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:46,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162162711] [2022-02-16 13:49:46,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:46,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:46,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:46,660 INFO L87 Difference]: Start difference. First operand 259 states and 703 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:46,919 INFO L93 Difference]: Finished difference Result 302 states and 782 transitions. [2022-02-16 13:49:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:46,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:46,920 INFO L225 Difference]: With dead ends: 302 [2022-02-16 13:49:46,920 INFO L226 Difference]: Without dead ends: 302 [2022-02-16 13:49:46,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:46,920 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:46,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 81 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-16 13:49:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 264. [2022-02-16 13:49:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7338403041825097) internal successors, (719), 263 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 719 transitions. [2022-02-16 13:49:46,923 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 719 transitions. Word has length 20 [2022-02-16 13:49:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:46,923 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 719 transitions. [2022-02-16 13:49:46,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 719 transitions. [2022-02-16 13:49:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:46,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:46,924 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:46,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-02-16 13:49:47,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-02-16 13:49:47,135 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash 558693532, now seen corresponding path program 150 times [2022-02-16 13:49:47,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:47,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690285103] [2022-02-16 13:49:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:47,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:47,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:47,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690285103] [2022-02-16 13:49:47,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690285103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:47,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836361310] [2022-02-16 13:49:47,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:47,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:47,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:47,238 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:47,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-16 13:49:47,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:49:47,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:47,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:49:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:47,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:47,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:47,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:47,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836361310] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:47,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:47,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:47,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605324189] [2022-02-16 13:49:47,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:47,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:47,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:47,762 INFO L87 Difference]: Start difference. First operand 264 states and 719 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:48,036 INFO L93 Difference]: Finished difference Result 303 states and 782 transitions. [2022-02-16 13:49:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:49:48,037 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:48,037 INFO L225 Difference]: With dead ends: 303 [2022-02-16 13:49:48,037 INFO L226 Difference]: Without dead ends: 302 [2022-02-16 13:49:48,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:48,038 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:48,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 88 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-16 13:49:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 263. [2022-02-16 13:49:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.732824427480916) internal successors, (716), 262 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 716 transitions. [2022-02-16 13:49:48,042 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 716 transitions. Word has length 20 [2022-02-16 13:49:48,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:48,043 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 716 transitions. [2022-02-16 13:49:48,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:48,043 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 716 transitions. [2022-02-16 13:49:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:48,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:48,043 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:48,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:48,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:48,258 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:48,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:48,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1146438854, now seen corresponding path program 151 times [2022-02-16 13:49:48,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:48,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114302048] [2022-02-16 13:49:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:48,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:48,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:48,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114302048] [2022-02-16 13:49:48,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114302048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:48,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375021378] [2022-02-16 13:49:48,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:48,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:48,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:48,311 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:48,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-16 13:49:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:48,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:48,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:48,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:48,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:48,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:48,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375021378] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:48,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:48,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:49:48,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477088891] [2022-02-16 13:49:48,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:48,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:49:48,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:49:48,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:49:48,760 INFO L87 Difference]: Start difference. First operand 263 states and 716 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:48,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:48,922 INFO L93 Difference]: Finished difference Result 290 states and 765 transitions. [2022-02-16 13:49:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:48,922 INFO L225 Difference]: With dead ends: 290 [2022-02-16 13:49:48,922 INFO L226 Difference]: Without dead ends: 288 [2022-02-16 13:49:48,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:48,923 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:48,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-16 13:49:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 261. [2022-02-16 13:49:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7384615384615385) internal successors, (712), 260 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 712 transitions. [2022-02-16 13:49:48,926 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 712 transitions. Word has length 20 [2022-02-16 13:49:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:48,926 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 712 transitions. [2022-02-16 13:49:48,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 712 transitions. [2022-02-16 13:49:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:48,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:48,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:48,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:49,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:49,139 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2006285928, now seen corresponding path program 152 times [2022-02-16 13:49:49,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:49,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037191348] [2022-02-16 13:49:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:49,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:49,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:49,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037191348] [2022-02-16 13:49:49,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037191348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:49,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290761782] [2022-02-16 13:49:49,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:49,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:49,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:49,241 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:49,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-16 13:49:49,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:49,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:49,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:49,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:49,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-02-16 13:49:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:49,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:49,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:49,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:49,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290761782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:49,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:49,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:49,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153183683] [2022-02-16 13:49:49,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:49,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:49,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:49,875 INFO L87 Difference]: Start difference. First operand 261 states and 712 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:50,300 INFO L93 Difference]: Finished difference Result 343 states and 848 transitions. [2022-02-16 13:49:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:50,300 INFO L225 Difference]: With dead ends: 343 [2022-02-16 13:49:50,301 INFO L226 Difference]: Without dead ends: 343 [2022-02-16 13:49:50,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:49:50,301 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:50,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 119 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-16 13:49:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 267. [2022-02-16 13:49:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7518796992481205) internal successors, (732), 266 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 732 transitions. [2022-02-16 13:49:50,304 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 732 transitions. Word has length 20 [2022-02-16 13:49:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:50,304 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 732 transitions. [2022-02-16 13:49:50,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 732 transitions. [2022-02-16 13:49:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:50,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:50,305 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:50,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:50,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:50,513 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:50,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1574148512, now seen corresponding path program 153 times [2022-02-16 13:49:50,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:50,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491735824] [2022-02-16 13:49:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:50,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:50,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:50,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491735824] [2022-02-16 13:49:50,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491735824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:50,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553148579] [2022-02-16 13:49:50,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:50,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:50,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:50,649 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:50,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-16 13:49:50,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:49:50,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:50,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:50,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:49:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:51,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:51,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:51,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:51,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553148579] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:51,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:51,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:51,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432019026] [2022-02-16 13:49:51,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:51,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:51,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:51,246 INFO L87 Difference]: Start difference. First operand 267 states and 732 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:51,681 INFO L93 Difference]: Finished difference Result 353 states and 856 transitions. [2022-02-16 13:49:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:49:51,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:51,682 INFO L225 Difference]: With dead ends: 353 [2022-02-16 13:49:51,682 INFO L226 Difference]: Without dead ends: 352 [2022-02-16 13:49:51,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:49:51,683 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 150 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:51,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 145 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-16 13:49:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 264. [2022-02-16 13:49:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.752851711026616) internal successors, (724), 263 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 724 transitions. [2022-02-16 13:49:51,686 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 724 transitions. Word has length 20 [2022-02-16 13:49:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:51,686 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 724 transitions. [2022-02-16 13:49:51,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 724 transitions. [2022-02-16 13:49:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:51,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:51,687 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:51,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:51,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:51,895 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2080388060, now seen corresponding path program 154 times [2022-02-16 13:49:51,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:51,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118148606] [2022-02-16 13:49:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:51,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:52,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:52,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118148606] [2022-02-16 13:49:52,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118148606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:52,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335737039] [2022-02-16 13:49:52,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:49:52,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:52,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:52,039 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:52,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-16 13:49:52,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:49:52,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:52,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:52,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:52,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:49:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:52,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:52,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:52,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:52,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335737039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:52,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:52,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:52,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378815418] [2022-02-16 13:49:52,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:52,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:52,834 INFO L87 Difference]: Start difference. First operand 264 states and 724 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:53,231 INFO L93 Difference]: Finished difference Result 345 states and 850 transitions. [2022-02-16 13:49:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:53,232 INFO L225 Difference]: With dead ends: 345 [2022-02-16 13:49:53,232 INFO L226 Difference]: Without dead ends: 345 [2022-02-16 13:49:53,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:49:53,233 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:53,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 120 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-16 13:49:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 264. [2022-02-16 13:49:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7604562737642584) internal successors, (726), 263 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 726 transitions. [2022-02-16 13:49:53,236 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 726 transitions. Word has length 20 [2022-02-16 13:49:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:53,236 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 726 transitions. [2022-02-16 13:49:53,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 726 transitions. [2022-02-16 13:49:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:53,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:53,237 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:53,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:53,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:53,451 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1390666136, now seen corresponding path program 155 times [2022-02-16 13:49:53,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:53,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873460818] [2022-02-16 13:49:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:53,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:53,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:53,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873460818] [2022-02-16 13:49:53,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873460818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:53,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909978254] [2022-02-16 13:49:53,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:49:53,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:53,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:53,601 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:53,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-16 13:49:53,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:49:53,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:53,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:49:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:54,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:54,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:54,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:54,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909978254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:54,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:54,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:54,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688963074] [2022-02-16 13:49:54,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:54,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:54,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:54,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:54,292 INFO L87 Difference]: Start difference. First operand 264 states and 726 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:54,591 INFO L93 Difference]: Finished difference Result 330 states and 830 transitions. [2022-02-16 13:49:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:49:54,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:54,592 INFO L225 Difference]: With dead ends: 330 [2022-02-16 13:49:54,592 INFO L226 Difference]: Without dead ends: 330 [2022-02-16 13:49:54,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:49:54,592 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:54,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 137 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-16 13:49:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 262. [2022-02-16 13:49:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7471264367816093) internal successors, (717), 261 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 717 transitions. [2022-02-16 13:49:54,595 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 717 transitions. Word has length 20 [2022-02-16 13:49:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:54,595 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 717 transitions. [2022-02-16 13:49:54,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 717 transitions. [2022-02-16 13:49:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:54,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:54,596 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:54,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-02-16 13:49:54,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-16 13:49:54,807 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:54,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash 262125916, now seen corresponding path program 156 times [2022-02-16 13:49:54,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:54,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139632136] [2022-02-16 13:49:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:54,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:54,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:54,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139632136] [2022-02-16 13:49:54,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139632136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:54,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283488059] [2022-02-16 13:49:54,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:49:54,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:54,938 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:54,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-16 13:49:55,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:49:55,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:55,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:49:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:55,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:55,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:55,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:55,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283488059] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:55,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:55,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:55,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298048208] [2022-02-16 13:49:55,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:55,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:55,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:55,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:55,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:55,757 INFO L87 Difference]: Start difference. First operand 262 states and 717 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:56,203 INFO L93 Difference]: Finished difference Result 336 states and 840 transitions. [2022-02-16 13:49:56,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:49:56,204 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:56,204 INFO L225 Difference]: With dead ends: 336 [2022-02-16 13:49:56,204 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 13:49:56,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:49:56,205 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:56,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 126 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 13:49:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 265. [2022-02-16 13:49:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.742424242424242) internal successors, (724), 264 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 724 transitions. [2022-02-16 13:49:56,208 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 724 transitions. Word has length 20 [2022-02-16 13:49:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:56,208 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 724 transitions. [2022-02-16 13:49:56,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 724 transitions. [2022-02-16 13:49:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:56,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:56,208 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:56,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-02-16 13:49:56,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-16 13:49:56,424 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1377223712, now seen corresponding path program 157 times [2022-02-16 13:49:56,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:56,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101640950] [2022-02-16 13:49:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:56,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:56,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:56,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101640950] [2022-02-16 13:49:56,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101640950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:56,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102222748] [2022-02-16 13:49:56,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:49:56,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:56,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:56,563 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:56,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-16 13:49:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:56,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:56,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:56,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:49:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:57,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:57,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:57,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:57,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102222748] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:57,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:57,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:49:57,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388026173] [2022-02-16 13:49:57,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:57,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:49:57,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:49:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:49:57,324 INFO L87 Difference]: Start difference. First operand 265 states and 724 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:57,677 INFO L93 Difference]: Finished difference Result 323 states and 826 transitions. [2022-02-16 13:49:57,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:49:57,677 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:57,678 INFO L225 Difference]: With dead ends: 323 [2022-02-16 13:49:57,678 INFO L226 Difference]: Without dead ends: 323 [2022-02-16 13:49:57,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:49:57,678 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:57,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 104 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:49:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-16 13:49:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 261. [2022-02-16 13:49:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7384615384615385) internal successors, (712), 260 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:57,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 712 transitions. [2022-02-16 13:49:57,681 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 712 transitions. Word has length 20 [2022-02-16 13:49:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:57,681 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 712 transitions. [2022-02-16 13:49:57,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:57,681 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 712 transitions. [2022-02-16 13:49:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:57,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:57,681 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:57,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-02-16 13:49:57,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-16 13:49:57,898 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2058596022, now seen corresponding path program 158 times [2022-02-16 13:49:57,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:57,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244414434] [2022-02-16 13:49:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:57,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:58,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:58,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244414434] [2022-02-16 13:49:58,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244414434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:58,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785936414] [2022-02-16 13:49:58,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:49:58,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:58,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:58,007 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:58,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-16 13:49:58,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:49:58,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:58,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:58,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:49:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:58,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:49:58,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:49:58,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:49:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:58,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785936414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:49:58,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:49:58,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:49:58,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808273798] [2022-02-16 13:49:58,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:49:58,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:49:58,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:49:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:49:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:49:58,770 INFO L87 Difference]: Start difference. First operand 261 states and 712 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:49:59,147 INFO L93 Difference]: Finished difference Result 292 states and 768 transitions. [2022-02-16 13:49:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:49:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:49:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:49:59,148 INFO L225 Difference]: With dead ends: 292 [2022-02-16 13:49:59,148 INFO L226 Difference]: Without dead ends: 289 [2022-02-16 13:49:59,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:49:59,148 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:49:59,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:49:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-16 13:49:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 262. [2022-02-16 13:49:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.735632183908046) internal successors, (714), 261 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 714 transitions. [2022-02-16 13:49:59,151 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 714 transitions. Word has length 20 [2022-02-16 13:49:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:49:59,151 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 714 transitions. [2022-02-16 13:49:59,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:49:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 714 transitions. [2022-02-16 13:49:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:49:59,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:49:59,152 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:49:59,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-02-16 13:49:59,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:59,359 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:49:59,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:49:59,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1850302714, now seen corresponding path program 159 times [2022-02-16 13:49:59,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:49:59,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148624995] [2022-02-16 13:49:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:49:59,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:49:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:49:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:59,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:49:59,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148624995] [2022-02-16 13:49:59,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148624995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:49:59,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828209257] [2022-02-16 13:49:59,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:49:59,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:49:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:49:59,468 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:49:59,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-16 13:49:59,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:49:59,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:49:59,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:49:59,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:49:59,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:49:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:49:59,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:00,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:00,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:00,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828209257] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:00,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:00,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:50:00,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154315770] [2022-02-16 13:50:00,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:00,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:00,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:00,152 INFO L87 Difference]: Start difference. First operand 262 states and 714 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:00,473 INFO L93 Difference]: Finished difference Result 305 states and 785 transitions. [2022-02-16 13:50:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:00,474 INFO L225 Difference]: With dead ends: 305 [2022-02-16 13:50:00,474 INFO L226 Difference]: Without dead ends: 303 [2022-02-16 13:50:00,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:00,474 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:00,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 108 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-16 13:50:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 265. [2022-02-16 13:50:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.731060606060606) internal successors, (721), 264 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 721 transitions. [2022-02-16 13:50:00,477 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 721 transitions. Word has length 20 [2022-02-16 13:50:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:00,477 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 721 transitions. [2022-02-16 13:50:00,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 721 transitions. [2022-02-16 13:50:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:00,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:00,478 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:00,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:00,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:00,679 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash -735204918, now seen corresponding path program 160 times [2022-02-16 13:50:00,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:00,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227142269] [2022-02-16 13:50:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:00,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:00,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:00,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227142269] [2022-02-16 13:50:00,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227142269] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:00,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422392873] [2022-02-16 13:50:00,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:00,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:00,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:00,807 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:00,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-16 13:50:00,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:00,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:00,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:00,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:01,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:50:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:01,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:01,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:01,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:01,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422392873] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:01,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:01,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:01,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96123507] [2022-02-16 13:50:01,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:01,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:01,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:01,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:01,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:01,609 INFO L87 Difference]: Start difference. First operand 265 states and 721 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:01,937 INFO L93 Difference]: Finished difference Result 292 states and 771 transitions. [2022-02-16 13:50:01,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:01,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:01,938 INFO L225 Difference]: With dead ends: 292 [2022-02-16 13:50:01,938 INFO L226 Difference]: Without dead ends: 292 [2022-02-16 13:50:01,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:01,938 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:01,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 66 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-16 13:50:01,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 260. [2022-02-16 13:50:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.72972972972973) internal successors, (707), 259 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 707 transitions. [2022-02-16 13:50:01,941 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 707 transitions. Word has length 20 [2022-02-16 13:50:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:01,941 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 707 transitions. [2022-02-16 13:50:01,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 707 transitions. [2022-02-16 13:50:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:01,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:01,941 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:01,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:02,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:02,148 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1369819074, now seen corresponding path program 161 times [2022-02-16 13:50:02,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:02,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709841505] [2022-02-16 13:50:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:02,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:02,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:02,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709841505] [2022-02-16 13:50:02,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709841505] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:02,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291316078] [2022-02-16 13:50:02,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:02,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:02,249 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:02,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-16 13:50:02,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:50:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:02,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:02,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:50:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:02,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:02,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:02,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:02,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291316078] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:02,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:02,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:02,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981040798] [2022-02-16 13:50:02,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:02,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:02,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:02,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:02,784 INFO L87 Difference]: Start difference. First operand 260 states and 707 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:02,929 INFO L93 Difference]: Finished difference Result 331 states and 838 transitions. [2022-02-16 13:50:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:02,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:02,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:02,930 INFO L225 Difference]: With dead ends: 331 [2022-02-16 13:50:02,930 INFO L226 Difference]: Without dead ends: 331 [2022-02-16 13:50:02,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:02,930 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:02,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 85 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-16 13:50:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 268. [2022-02-16 13:50:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.756554307116105) internal successors, (736), 267 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 736 transitions. [2022-02-16 13:50:02,933 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 736 transitions. Word has length 20 [2022-02-16 13:50:02,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:02,933 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 736 transitions. [2022-02-16 13:50:02,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 736 transitions. [2022-02-16 13:50:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:02,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:02,934 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:02,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:03,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:03,150 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:03,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:03,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2084351930, now seen corresponding path program 162 times [2022-02-16 13:50:03,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:03,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407533899] [2022-02-16 13:50:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:03,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:03,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:03,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407533899] [2022-02-16 13:50:03,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407533899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:03,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632244764] [2022-02-16 13:50:03,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:03,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:03,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:03,239 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:03,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-16 13:50:03,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:50:03,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:03,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:03,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:50:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:03,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:03,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:03,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:03,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632244764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:03,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:03,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:50:03,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905924964] [2022-02-16 13:50:03,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:03,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:03,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:03,848 INFO L87 Difference]: Start difference. First operand 268 states and 736 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:04,131 INFO L93 Difference]: Finished difference Result 341 states and 846 transitions. [2022-02-16 13:50:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:50:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:04,132 INFO L225 Difference]: With dead ends: 341 [2022-02-16 13:50:04,132 INFO L226 Difference]: Without dead ends: 340 [2022-02-16 13:50:04,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:04,132 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:04,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 119 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-16 13:50:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 265. [2022-02-16 13:50:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.757575757575758) internal successors, (728), 264 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 728 transitions. [2022-02-16 13:50:04,135 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 728 transitions. Word has length 20 [2022-02-16 13:50:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:04,135 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 728 transitions. [2022-02-16 13:50:04,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 728 transitions. [2022-02-16 13:50:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:04,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:04,136 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:04,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:04,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:04,352 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1578112382, now seen corresponding path program 163 times [2022-02-16 13:50:04,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:04,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174075534] [2022-02-16 13:50:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:04,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:04,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:04,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174075534] [2022-02-16 13:50:04,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174075534] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:04,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919290467] [2022-02-16 13:50:04,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:04,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:04,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:04,461 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:04,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-16 13:50:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:04,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:50:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:04,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:05,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:05,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:05,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919290467] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:05,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:05,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:05,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785738367] [2022-02-16 13:50:05,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:05,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:05,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:05,061 INFO L87 Difference]: Start difference. First operand 265 states and 728 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:05,314 INFO L93 Difference]: Finished difference Result 358 states and 881 transitions. [2022-02-16 13:50:05,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:05,315 INFO L225 Difference]: With dead ends: 358 [2022-02-16 13:50:05,315 INFO L226 Difference]: Without dead ends: 358 [2022-02-16 13:50:05,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:50:05,315 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 126 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:05,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 126 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:05,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-16 13:50:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 267. [2022-02-16 13:50:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7706766917293235) internal successors, (737), 266 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 737 transitions. [2022-02-16 13:50:05,319 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 737 transitions. Word has length 20 [2022-02-16 13:50:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:05,319 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 737 transitions. [2022-02-16 13:50:05,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 737 transitions. [2022-02-16 13:50:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:05,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:05,319 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:05,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-02-16 13:50:05,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:05,535 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:05,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2027132990, now seen corresponding path program 164 times [2022-02-16 13:50:05,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:05,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142910150] [2022-02-16 13:50:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:05,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:05,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:05,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142910150] [2022-02-16 13:50:05,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142910150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:05,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878889476] [2022-02-16 13:50:05,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:05,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:05,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:05,695 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:05,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-16 13:50:05,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:05,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:06,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:50:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:06,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:06,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:06,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:06,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878889476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:06,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:06,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:06,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546196739] [2022-02-16 13:50:06,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:06,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:06,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:06,474 INFO L87 Difference]: Start difference. First operand 267 states and 737 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:06,837 INFO L93 Difference]: Finished difference Result 356 states and 878 transitions. [2022-02-16 13:50:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:50:06,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:06,838 INFO L225 Difference]: With dead ends: 356 [2022-02-16 13:50:06,838 INFO L226 Difference]: Without dead ends: 356 [2022-02-16 13:50:06,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:50:06,838 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:06,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 168 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-16 13:50:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 265. [2022-02-16 13:50:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.757575757575758) internal successors, (728), 264 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 728 transitions. [2022-02-16 13:50:06,842 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 728 transitions. Word has length 20 [2022-02-16 13:50:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:06,842 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 728 transitions. [2022-02-16 13:50:06,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 728 transitions. [2022-02-16 13:50:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:06,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:06,842 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:06,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:07,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-02-16 13:50:07,058 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash -374340938, now seen corresponding path program 165 times [2022-02-16 13:50:07,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:07,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36580783] [2022-02-16 13:50:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:07,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:07,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:07,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36580783] [2022-02-16 13:50:07,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36580783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:07,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290305754] [2022-02-16 13:50:07,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:07,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:07,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:07,183 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:07,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-16 13:50:07,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:50:07,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:07,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:07,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:50:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:07,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:07,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:07,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:07,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290305754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:07,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:07,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:50:07,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223611792] [2022-02-16 13:50:07,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:07,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:07,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:07,779 INFO L87 Difference]: Start difference. First operand 265 states and 728 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:07,970 INFO L93 Difference]: Finished difference Result 357 states and 877 transitions. [2022-02-16 13:50:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:07,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:07,970 INFO L225 Difference]: With dead ends: 357 [2022-02-16 13:50:07,970 INFO L226 Difference]: Without dead ends: 355 [2022-02-16 13:50:07,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:50:07,971 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:07,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 103 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-02-16 13:50:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 268. [2022-02-16 13:50:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.752808988764045) internal successors, (735), 267 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 735 transitions. [2022-02-16 13:50:07,974 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 735 transitions. Word has length 20 [2022-02-16 13:50:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:07,974 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 735 transitions. [2022-02-16 13:50:07,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 735 transitions. [2022-02-16 13:50:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:07,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:07,975 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:07,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:08,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-16 13:50:08,187 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash 740756858, now seen corresponding path program 166 times [2022-02-16 13:50:08,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:08,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225245541] [2022-02-16 13:50:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:08,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:08,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:08,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225245541] [2022-02-16 13:50:08,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225245541] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:08,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489898614] [2022-02-16 13:50:08,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:08,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:08,268 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:08,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-16 13:50:08,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:08,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:08,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:08,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:08,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:50:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:08,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:08,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:08,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:08,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489898614] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:08,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:08,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:08,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011712529] [2022-02-16 13:50:08,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:08,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:08,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:08,739 INFO L87 Difference]: Start difference. First operand 268 states and 735 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:08,970 INFO L93 Difference]: Finished difference Result 350 states and 875 transitions. [2022-02-16 13:50:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:08,970 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:08,970 INFO L225 Difference]: With dead ends: 350 [2022-02-16 13:50:08,970 INFO L226 Difference]: Without dead ends: 350 [2022-02-16 13:50:08,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:50:08,971 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 110 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:08,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 128 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-16 13:50:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 266. [2022-02-16 13:50:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.7471698113207546) internal successors, (728), 265 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 728 transitions. [2022-02-16 13:50:08,974 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 728 transitions. Word has length 20 [2022-02-16 13:50:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:08,974 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 728 transitions. [2022-02-16 13:50:08,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 728 transitions. [2022-02-16 13:50:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:08,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:08,974 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:08,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:09,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-16 13:50:09,179 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:09,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash 310655204, now seen corresponding path program 167 times [2022-02-16 13:50:09,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:09,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895247715] [2022-02-16 13:50:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:09,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:09,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:09,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895247715] [2022-02-16 13:50:09,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895247715] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:09,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074210469] [2022-02-16 13:50:09,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:09,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:09,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:09,271 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:09,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-16 13:50:09,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:50:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:09,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:50:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:09,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:09,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:09,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:09,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074210469] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:09,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:09,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:09,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871662012] [2022-02-16 13:50:09,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:09,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:09,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:09,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:09,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:09,810 INFO L87 Difference]: Start difference. First operand 266 states and 728 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:09,990 INFO L93 Difference]: Finished difference Result 327 states and 837 transitions. [2022-02-16 13:50:09,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:09,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:09,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:09,991 INFO L225 Difference]: With dead ends: 327 [2022-02-16 13:50:09,991 INFO L226 Difference]: Without dead ends: 327 [2022-02-16 13:50:09,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:50:09,991 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:09,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 84 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-16 13:50:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 267. [2022-02-16 13:50:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7518796992481205) internal successors, (732), 266 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 732 transitions. [2022-02-16 13:50:09,994 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 732 transitions. Word has length 20 [2022-02-16 13:50:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:09,994 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 732 transitions. [2022-02-16 13:50:09,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 732 transitions. [2022-02-16 13:50:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:09,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:09,995 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:10,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:10,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-16 13:50:10,199 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:10,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:10,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1000377128, now seen corresponding path program 168 times [2022-02-16 13:50:10,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:10,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857455185] [2022-02-16 13:50:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:10,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:10,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:10,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857455185] [2022-02-16 13:50:10,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857455185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:10,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349221981] [2022-02-16 13:50:10,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:10,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:10,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:10,279 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:10,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-16 13:50:10,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:50:10,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:10,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:10,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:50:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:10,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:10,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:10,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:10,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349221981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:10,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:10,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:10,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057912167] [2022-02-16 13:50:10,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:10,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:10,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:10,941 INFO L87 Difference]: Start difference. First operand 267 states and 732 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:11,245 INFO L93 Difference]: Finished difference Result 334 states and 843 transitions. [2022-02-16 13:50:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:11,246 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:50:11,246 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 13:50:11,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:50:11,246 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:11,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 113 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 13:50:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 263. [2022-02-16 13:50:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7404580152671754) internal successors, (718), 262 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 718 transitions. [2022-02-16 13:50:11,249 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 718 transitions. Word has length 20 [2022-02-16 13:50:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:11,249 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 718 transitions. [2022-02-16 13:50:11,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 718 transitions. [2022-02-16 13:50:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:11,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:11,250 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:11,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-02-16 13:50:11,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-16 13:50:11,459 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:11,459 INFO L85 PathProgramCache]: Analyzing trace with hash 704949946, now seen corresponding path program 169 times [2022-02-16 13:50:11,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:11,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211358294] [2022-02-16 13:50:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:11,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:11,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:11,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211358294] [2022-02-16 13:50:11,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211358294] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:11,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764107951] [2022-02-16 13:50:11,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:11,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:11,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:11,558 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:11,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-16 13:50:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:11,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:11,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:11,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:12,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:12,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:12,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764107951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:12,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:12,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:12,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139584146] [2022-02-16 13:50:12,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:12,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:12,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:12,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:12,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:12,195 INFO L87 Difference]: Start difference. First operand 263 states and 718 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:12,452 INFO L93 Difference]: Finished difference Result 295 states and 779 transitions. [2022-02-16 13:50:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:12,453 INFO L225 Difference]: With dead ends: 295 [2022-02-16 13:50:12,453 INFO L226 Difference]: Without dead ends: 295 [2022-02-16 13:50:12,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:50:12,453 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:12,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 89 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-16 13:50:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 261. [2022-02-16 13:50:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7346153846153847) internal successors, (711), 260 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 711 transitions. [2022-02-16 13:50:12,456 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 711 transitions. Word has length 20 [2022-02-16 13:50:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:12,456 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 711 transitions. [2022-02-16 13:50:12,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 711 transitions. [2022-02-16 13:50:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:12,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:12,457 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:12,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:12,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:12,675 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 540740550, now seen corresponding path program 170 times [2022-02-16 13:50:12,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:12,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808818181] [2022-02-16 13:50:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:12,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:12,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:12,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808818181] [2022-02-16 13:50:12,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808818181] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:12,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20775144] [2022-02-16 13:50:12,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:12,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:12,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:12,800 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:12,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-16 13:50:12,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:12,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:13,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:13,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:13,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:13,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:13,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20775144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:13,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:13,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:50:13,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627921998] [2022-02-16 13:50:13,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:13,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:13,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:13,246 INFO L87 Difference]: Start difference. First operand 261 states and 711 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:13,384 INFO L93 Difference]: Finished difference Result 314 states and 805 transitions. [2022-02-16 13:50:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:13,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:13,385 INFO L225 Difference]: With dead ends: 314 [2022-02-16 13:50:13,385 INFO L226 Difference]: Without dead ends: 312 [2022-02-16 13:50:13,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:50:13,386 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:13,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 78 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-16 13:50:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 266. [2022-02-16 13:50:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.728301886792453) internal successors, (723), 265 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 723 transitions. [2022-02-16 13:50:13,389 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 723 transitions. Word has length 20 [2022-02-16 13:50:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:13,389 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 723 transitions. [2022-02-16 13:50:13,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 723 transitions. [2022-02-16 13:50:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:13,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:13,389 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:13,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-02-16 13:50:13,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:13,608 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:13,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:13,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1655838346, now seen corresponding path program 171 times [2022-02-16 13:50:13,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:13,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673515725] [2022-02-16 13:50:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:13,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:13,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:13,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673515725] [2022-02-16 13:50:13,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673515725] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:13,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031584823] [2022-02-16 13:50:13,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:13,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:13,686 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:13,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-16 13:50:13,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:50:13,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:13,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:13,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:13,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:14,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:14,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:14,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031584823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:14,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:14,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:14,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895531770] [2022-02-16 13:50:14,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:14,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:14,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:14,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:14,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:14,131 INFO L87 Difference]: Start difference. First operand 266 states and 723 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:14,308 INFO L93 Difference]: Finished difference Result 316 states and 811 transitions. [2022-02-16 13:50:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:50:14,308 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:14,309 INFO L225 Difference]: With dead ends: 316 [2022-02-16 13:50:14,309 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:50:14,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:14,309 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 63 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:14,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 100 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:50:14,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2022-02-16 13:50:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.731060606060606) internal successors, (721), 264 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 721 transitions. [2022-02-16 13:50:14,312 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 721 transitions. Word has length 20 [2022-02-16 13:50:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:14,312 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 721 transitions. [2022-02-16 13:50:14,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 721 transitions. [2022-02-16 13:50:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:14,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:14,313 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:14,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:14,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-02-16 13:50:14,529 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1155994012, now seen corresponding path program 172 times [2022-02-16 13:50:14,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:14,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32680529] [2022-02-16 13:50:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:14,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:14,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:14,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32680529] [2022-02-16 13:50:14,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32680529] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:14,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870485081] [2022-02-16 13:50:14,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:14,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:14,634 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:14,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-16 13:50:14,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:14,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:14,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:15,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:15,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:15,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870485081] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:15,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:15,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:15,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507418528] [2022-02-16 13:50:15,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:15,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:15,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:15,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:15,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:15,068 INFO L87 Difference]: Start difference. First operand 265 states and 721 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:15,227 INFO L93 Difference]: Finished difference Result 301 states and 792 transitions. [2022-02-16 13:50:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:15,227 INFO L225 Difference]: With dead ends: 301 [2022-02-16 13:50:15,227 INFO L226 Difference]: Without dead ends: 301 [2022-02-16 13:50:15,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:15,243 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:15,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 72 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-16 13:50:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 260. [2022-02-16 13:50:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.72972972972973) internal successors, (707), 259 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 707 transitions. [2022-02-16 13:50:15,246 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 707 transitions. Word has length 20 [2022-02-16 13:50:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:15,246 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 707 transitions. [2022-02-16 13:50:15,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:15,246 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 707 transitions. [2022-02-16 13:50:15,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:15,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:15,247 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:15,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:15,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:15,468 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:15,469 INFO L85 PathProgramCache]: Analyzing trace with hash 539126330, now seen corresponding path program 173 times [2022-02-16 13:50:15,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:15,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126688660] [2022-02-16 13:50:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:15,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:15,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:15,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126688660] [2022-02-16 13:50:15,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126688660] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:15,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672776023] [2022-02-16 13:50:15,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:15,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:15,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:15,523 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:15,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-16 13:50:15,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:15,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:15,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:15,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:15,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:15,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:15,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:15,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:15,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672776023] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:15,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:15,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:50:15,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401110339] [2022-02-16 13:50:15,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:15,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:15,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:15,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:15,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:15,864 INFO L87 Difference]: Start difference. First operand 260 states and 707 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:16,005 INFO L93 Difference]: Finished difference Result 286 states and 755 transitions. [2022-02-16 13:50:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:16,005 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:16,005 INFO L225 Difference]: With dead ends: 286 [2022-02-16 13:50:16,005 INFO L226 Difference]: Without dead ends: 283 [2022-02-16 13:50:16,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:50:16,006 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:16,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-16 13:50:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 262. [2022-02-16 13:50:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7241379310344827) internal successors, (711), 261 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 711 transitions. [2022-02-16 13:50:16,009 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 711 transitions. Word has length 20 [2022-02-16 13:50:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:16,009 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 711 transitions. [2022-02-16 13:50:16,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 711 transitions. [2022-02-16 13:50:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:16,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:16,009 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:16,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:16,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:16,223 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:16,223 INFO L85 PathProgramCache]: Analyzing trace with hash 747419638, now seen corresponding path program 174 times [2022-02-16 13:50:16,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:16,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918710625] [2022-02-16 13:50:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:16,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:16,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:16,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918710625] [2022-02-16 13:50:16,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918710625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:16,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403220943] [2022-02-16 13:50:16,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:16,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:16,290 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:16,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-16 13:50:16,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:50:16,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:16,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:16,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:50:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:16,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:16,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:16,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:16,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403220943] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:16,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:16,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:50:16,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143061628] [2022-02-16 13:50:16,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:16,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:16,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:16,705 INFO L87 Difference]: Start difference. First operand 262 states and 711 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:16,915 INFO L93 Difference]: Finished difference Result 299 states and 772 transitions. [2022-02-16 13:50:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:16,916 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:16,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:16,916 INFO L225 Difference]: With dead ends: 299 [2022-02-16 13:50:16,916 INFO L226 Difference]: Without dead ends: 297 [2022-02-16 13:50:16,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:50:16,917 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:16,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 83 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-16 13:50:16,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 265. [2022-02-16 13:50:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.7196969696969697) internal successors, (718), 264 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 718 transitions. [2022-02-16 13:50:16,934 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 718 transitions. Word has length 20 [2022-02-16 13:50:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:16,934 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 718 transitions. [2022-02-16 13:50:16,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 718 transitions. [2022-02-16 13:50:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:16,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:16,934 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:16,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:17,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-02-16 13:50:17,155 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:17,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:17,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1862517434, now seen corresponding path program 175 times [2022-02-16 13:50:17,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:17,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496824669] [2022-02-16 13:50:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:17,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:17,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:17,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496824669] [2022-02-16 13:50:17,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496824669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:17,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690378328] [2022-02-16 13:50:17,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:17,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:17,241 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:17,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-16 13:50:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:17,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:17,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:50:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:17,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:17,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:17,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:17,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690378328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:17,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:17,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:50:17,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619422291] [2022-02-16 13:50:17,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:17,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:17,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:17,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:17,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:17,756 INFO L87 Difference]: Start difference. First operand 265 states and 718 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:17,921 INFO L93 Difference]: Finished difference Result 286 states and 758 transitions. [2022-02-16 13:50:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:17,922 INFO L225 Difference]: With dead ends: 286 [2022-02-16 13:50:17,922 INFO L226 Difference]: Without dead ends: 286 [2022-02-16 13:50:17,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:50:17,922 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:17,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 48 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-02-16 13:50:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 261. [2022-02-16 13:50:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.726923076923077) internal successors, (709), 260 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 709 transitions. [2022-02-16 13:50:17,925 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 709 transitions. Word has length 20 [2022-02-16 13:50:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:17,925 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 709 transitions. [2022-02-16 13:50:17,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 709 transitions. [2022-02-16 13:50:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:17,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:17,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:17,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:18,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:18,142 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash -520037540, now seen corresponding path program 176 times [2022-02-16 13:50:18,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:18,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132361276] [2022-02-16 13:50:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:18,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:18,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:18,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:18,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132361276] [2022-02-16 13:50:18,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132361276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:18,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919946768] [2022-02-16 13:50:18,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:18,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:18,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:18,233 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:18,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-16 13:50:18,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:18,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:18,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:18,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:18,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:18,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:18,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:18,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:18,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919946768] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:18,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:18,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:50:18,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074194299] [2022-02-16 13:50:18,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:18,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:18,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:18,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:18,670 INFO L87 Difference]: Start difference. First operand 261 states and 709 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:18,853 INFO L93 Difference]: Finished difference Result 301 states and 776 transitions. [2022-02-16 13:50:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:18,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:18,853 INFO L225 Difference]: With dead ends: 301 [2022-02-16 13:50:18,853 INFO L226 Difference]: Without dead ends: 299 [2022-02-16 13:50:18,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:18,854 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:18,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 64 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-16 13:50:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 266. [2022-02-16 13:50:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.720754716981132) internal successors, (721), 265 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 721 transitions. [2022-02-16 13:50:18,857 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 721 transitions. Word has length 20 [2022-02-16 13:50:18,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:18,857 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 721 transitions. [2022-02-16 13:50:18,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:18,857 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 721 transitions. [2022-02-16 13:50:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:18,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:18,857 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:18,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:19,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:19,067 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash 595060256, now seen corresponding path program 177 times [2022-02-16 13:50:19,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:19,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736363127] [2022-02-16 13:50:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:19,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:19,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:19,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736363127] [2022-02-16 13:50:19,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736363127] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:19,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756216308] [2022-02-16 13:50:19,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:19,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:19,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:19,157 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:19,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-16 13:50:19,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:50:19,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:19,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:19,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:19,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:19,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:19,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:19,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:19,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756216308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:19,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:19,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:50:19,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531519818] [2022-02-16 13:50:19,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:19,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:50:19,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:19,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:50:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:50:19,617 INFO L87 Difference]: Start difference. First operand 266 states and 721 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:19,795 INFO L93 Difference]: Finished difference Result 301 states and 778 transitions. [2022-02-16 13:50:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:50:19,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:19,796 INFO L225 Difference]: With dead ends: 301 [2022-02-16 13:50:19,796 INFO L226 Difference]: Without dead ends: 301 [2022-02-16 13:50:19,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:19,796 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:19,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 57 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-16 13:50:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 265. [2022-02-16 13:50:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.7234848484848486) internal successors, (719), 264 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 719 transitions. [2022-02-16 13:50:19,799 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 719 transitions. Word has length 20 [2022-02-16 13:50:19,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:19,799 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 719 transitions. [2022-02-16 13:50:19,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 719 transitions. [2022-02-16 13:50:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:19,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:19,800 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:19,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-02-16 13:50:20,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:20,000 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2078195194, now seen corresponding path program 178 times [2022-02-16 13:50:20,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:20,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293902700] [2022-02-16 13:50:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:20,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:20,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:20,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293902700] [2022-02-16 13:50:20,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293902700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:20,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035679289] [2022-02-16 13:50:20,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:20,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:20,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:20,076 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:20,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-16 13:50:20,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:20,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:20,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:20,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:20,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:20,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:50:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:20,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035679289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:20,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:20,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:50:20,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648946955] [2022-02-16 13:50:20,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:20,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:50:20,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:20,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:50:20,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:50:20,471 INFO L87 Difference]: Start difference. First operand 265 states and 719 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:20,566 INFO L93 Difference]: Finished difference Result 289 states and 764 transitions. [2022-02-16 13:50:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:20,567 INFO L225 Difference]: With dead ends: 289 [2022-02-16 13:50:20,567 INFO L226 Difference]: Without dead ends: 289 [2022-02-16 13:50:20,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:20,567 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:20,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-16 13:50:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 261. [2022-02-16 13:50:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.726923076923077) internal successors, (709), 260 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 709 transitions. [2022-02-16 13:50:20,570 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 709 transitions. Word has length 20 [2022-02-16 13:50:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:20,570 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 709 transitions. [2022-02-16 13:50:20,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 709 transitions. [2022-02-16 13:50:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:20,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:20,571 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:20,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:20,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-02-16 13:50:20,787 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1689450332, now seen corresponding path program 179 times [2022-02-16 13:50:20,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:20,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157718577] [2022-02-16 13:50:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:20,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:20,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:20,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157718577] [2022-02-16 13:50:20,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157718577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:20,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72416686] [2022-02-16 13:50:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:20,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:20,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:20,861 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:20,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-16 13:50:20,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:20,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:20,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:20,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:21,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:50:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:21,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:21,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:21,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:21,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72416686] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:21,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:21,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:50:21,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466967971] [2022-02-16 13:50:21,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:21,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:21,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:21,569 INFO L87 Difference]: Start difference. First operand 261 states and 709 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:22,032 INFO L93 Difference]: Finished difference Result 410 states and 1036 transitions. [2022-02-16 13:50:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:22,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:22,033 INFO L225 Difference]: With dead ends: 410 [2022-02-16 13:50:22,033 INFO L226 Difference]: Without dead ends: 410 [2022-02-16 13:50:22,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:50:22,033 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 163 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:22,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 92 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-16 13:50:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 267. [2022-02-16 13:50:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.736842105263158) internal successors, (728), 266 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 728 transitions. [2022-02-16 13:50:22,037 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 728 transitions. Word has length 20 [2022-02-16 13:50:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:22,037 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 728 transitions. [2022-02-16 13:50:22,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:22,037 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 728 transitions. [2022-02-16 13:50:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:22,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:22,037 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:22,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-02-16 13:50:22,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:22,254 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1890984108, now seen corresponding path program 180 times [2022-02-16 13:50:22,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:22,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689075923] [2022-02-16 13:50:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:22,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:22,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:22,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689075923] [2022-02-16 13:50:22,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689075923] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:22,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018818495] [2022-02-16 13:50:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:22,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:22,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:22,388 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:22,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-16 13:50:22,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:50:22,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:22,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:22,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:50:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:22,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:22,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:22,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:23,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018818495] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:23,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:23,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:23,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803530009] [2022-02-16 13:50:23,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:23,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:23,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:23,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:23,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:23,011 INFO L87 Difference]: Start difference. First operand 267 states and 728 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:23,483 INFO L93 Difference]: Finished difference Result 411 states and 1036 transitions. [2022-02-16 13:50:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:50:23,483 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:23,484 INFO L225 Difference]: With dead ends: 411 [2022-02-16 13:50:23,484 INFO L226 Difference]: Without dead ends: 410 [2022-02-16 13:50:23,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:50:23,484 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 153 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:23,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 93 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-16 13:50:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 266. [2022-02-16 13:50:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.7358490566037736) internal successors, (725), 265 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 725 transitions. [2022-02-16 13:50:23,487 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 725 transitions. Word has length 20 [2022-02-16 13:50:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:23,487 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 725 transitions. [2022-02-16 13:50:23,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 725 transitions. [2022-02-16 13:50:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:23,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:23,488 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:23,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-02-16 13:50:23,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:23,702 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:23,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1303238786, now seen corresponding path program 181 times [2022-02-16 13:50:23,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:23,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346270413] [2022-02-16 13:50:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:23,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:23,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:23,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346270413] [2022-02-16 13:50:23,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346270413] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:23,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486599689] [2022-02-16 13:50:23,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:23,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:23,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:23,774 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:23,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-16 13:50:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:23,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:24,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:24,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:24,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:24,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:24,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486599689] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:24,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:24,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:50:24,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684399733] [2022-02-16 13:50:24,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:24,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:24,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:24,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:24,329 INFO L87 Difference]: Start difference. First operand 266 states and 725 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:24,785 INFO L93 Difference]: Finished difference Result 398 states and 1019 transitions. [2022-02-16 13:50:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:24,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:24,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:24,786 INFO L225 Difference]: With dead ends: 398 [2022-02-16 13:50:24,786 INFO L226 Difference]: Without dead ends: 396 [2022-02-16 13:50:24,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:24,786 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:24,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 65 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-02-16 13:50:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 265. [2022-02-16 13:50:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.734848484848485) internal successors, (722), 264 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 722 transitions. [2022-02-16 13:50:24,790 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 722 transitions. Word has length 20 [2022-02-16 13:50:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:24,790 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 722 transitions. [2022-02-16 13:50:24,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 722 transitions. [2022-02-16 13:50:24,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:24,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:24,790 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:24,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-02-16 13:50:24,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-02-16 13:50:24,991 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1663031090, now seen corresponding path program 182 times [2022-02-16 13:50:24,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:24,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676430090] [2022-02-16 13:50:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:24,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:25,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:25,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676430090] [2022-02-16 13:50:25,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676430090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:25,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877334107] [2022-02-16 13:50:25,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:25,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:25,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:25,086 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:25,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-16 13:50:25,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:25,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:25,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:25,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:25,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:25,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:25,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877334107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:25,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:25,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:50:25,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860193108] [2022-02-16 13:50:25,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:25,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:25,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:25,777 INFO L87 Difference]: Start difference. First operand 265 states and 722 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:26,314 INFO L93 Difference]: Finished difference Result 408 states and 1027 transitions. [2022-02-16 13:50:26,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:26,314 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:26,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:26,315 INFO L225 Difference]: With dead ends: 408 [2022-02-16 13:50:26,315 INFO L226 Difference]: Without dead ends: 405 [2022-02-16 13:50:26,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:50:26,315 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 142 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:26,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 109 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-02-16 13:50:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 263. [2022-02-16 13:50:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7404580152671754) internal successors, (718), 262 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:26,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 718 transitions. [2022-02-16 13:50:26,318 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 718 transitions. Word has length 20 [2022-02-16 13:50:26,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:26,318 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 718 transitions. [2022-02-16 13:50:26,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 718 transitions. [2022-02-16 13:50:26,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:26,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:26,319 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:26,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-02-16 13:50:26,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:26,527 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash 630497752, now seen corresponding path program 183 times [2022-02-16 13:50:26,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:26,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979099681] [2022-02-16 13:50:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:26,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:26,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:26,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979099681] [2022-02-16 13:50:26,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979099681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:26,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558268328] [2022-02-16 13:50:26,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:26,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:26,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:26,674 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:26,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-16 13:50:26,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:50:26,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:26,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:26,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:27,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:50:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:27,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:27,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:27,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:27,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558268328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:27,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:27,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:50:27,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654339172] [2022-02-16 13:50:27,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:27,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:27,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:27,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:27,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:27,516 INFO L87 Difference]: Start difference. First operand 263 states and 718 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:27,968 INFO L93 Difference]: Finished difference Result 416 states and 1048 transitions. [2022-02-16 13:50:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:27,969 INFO L225 Difference]: With dead ends: 416 [2022-02-16 13:50:27,969 INFO L226 Difference]: Without dead ends: 416 [2022-02-16 13:50:27,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:50:27,970 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 97 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:27,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 137 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-16 13:50:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 267. [2022-02-16 13:50:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.744360902255639) internal successors, (730), 266 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 730 transitions. [2022-02-16 13:50:27,973 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 730 transitions. Word has length 20 [2022-02-16 13:50:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:27,973 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 730 transitions. [2022-02-16 13:50:27,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 730 transitions. [2022-02-16 13:50:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:27,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:27,974 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:27,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-02-16 13:50:28,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:28,187 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:28,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1345030608, now seen corresponding path program 184 times [2022-02-16 13:50:28,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:28,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953513111] [2022-02-16 13:50:28,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:28,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:28,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:28,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953513111] [2022-02-16 13:50:28,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953513111] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:28,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082365967] [2022-02-16 13:50:28,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:28,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:28,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:28,267 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:28,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-16 13:50:28,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:28,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:28,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:28,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:50:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:28,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:28,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:28,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:28,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082365967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:28,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:28,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:50:28,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309738950] [2022-02-16 13:50:28,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:28,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:28,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:28,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:28,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:28,858 INFO L87 Difference]: Start difference. First operand 267 states and 730 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:29,258 INFO L93 Difference]: Finished difference Result 417 states and 1048 transitions. [2022-02-16 13:50:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:50:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:29,259 INFO L225 Difference]: With dead ends: 417 [2022-02-16 13:50:29,259 INFO L226 Difference]: Without dead ends: 416 [2022-02-16 13:50:29,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:50:29,260 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 109 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:29,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 94 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-16 13:50:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 266. [2022-02-16 13:50:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.7433962264150944) internal successors, (727), 265 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 727 transitions. [2022-02-16 13:50:29,263 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 727 transitions. Word has length 20 [2022-02-16 13:50:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:29,263 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 727 transitions. [2022-02-16 13:50:29,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 727 transitions. [2022-02-16 13:50:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:29,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:29,263 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:29,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:29,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:29,478 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1932775930, now seen corresponding path program 185 times [2022-02-16 13:50:29,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:29,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521618102] [2022-02-16 13:50:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:29,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:29,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:29,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521618102] [2022-02-16 13:50:29,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521618102] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:29,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102303602] [2022-02-16 13:50:29,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:29,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:29,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:29,568 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:29,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-16 13:50:29,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:29,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:29,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:29,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:29,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:29,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:30,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:30,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:30,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102303602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:30,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:30,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:30,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327078532] [2022-02-16 13:50:30,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:30,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:30,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:30,172 INFO L87 Difference]: Start difference. First operand 266 states and 727 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:30,528 INFO L93 Difference]: Finished difference Result 404 states and 1031 transitions. [2022-02-16 13:50:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:30,528 INFO L225 Difference]: With dead ends: 404 [2022-02-16 13:50:30,528 INFO L226 Difference]: Without dead ends: 402 [2022-02-16 13:50:30,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:50:30,529 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:30,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 91 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:30,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-02-16 13:50:30,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 264. [2022-02-16 13:50:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7490494296577945) internal successors, (723), 263 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 723 transitions. [2022-02-16 13:50:30,532 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 723 transitions. Word has length 20 [2022-02-16 13:50:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:30,532 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 723 transitions. [2022-02-16 13:50:30,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 723 transitions. [2022-02-16 13:50:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:30,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:30,533 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:30,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-02-16 13:50:30,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:30,747 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1502344292, now seen corresponding path program 186 times [2022-02-16 13:50:30,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:30,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864457789] [2022-02-16 13:50:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:30,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:30,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:30,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864457789] [2022-02-16 13:50:30,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864457789] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:30,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043002285] [2022-02-16 13:50:30,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:30,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:30,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:30,833 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:30,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-16 13:50:30,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:50:30,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:30,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:31,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:50:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:31,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:31,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:31,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:31,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043002285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:31,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:31,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:50:31,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82971624] [2022-02-16 13:50:31,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:31,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:31,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:31,558 INFO L87 Difference]: Start difference. First operand 264 states and 723 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:32,176 INFO L93 Difference]: Finished difference Result 455 states and 1111 transitions. [2022-02-16 13:50:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:32,176 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:32,177 INFO L225 Difference]: With dead ends: 455 [2022-02-16 13:50:32,177 INFO L226 Difference]: Without dead ends: 455 [2022-02-16 13:50:32,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:50:32,177 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 190 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:32,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 162 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-02-16 13:50:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 270. [2022-02-16 13:50:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.7620817843866172) internal successors, (743), 269 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 743 transitions. [2022-02-16 13:50:32,181 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 743 transitions. Word has length 20 [2022-02-16 13:50:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:32,181 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 743 transitions. [2022-02-16 13:50:32,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 743 transitions. [2022-02-16 13:50:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:32,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:32,181 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:32,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:32,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:32,384 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:32,385 INFO L85 PathProgramCache]: Analyzing trace with hash -787811436, now seen corresponding path program 187 times [2022-02-16 13:50:32,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:32,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300075779] [2022-02-16 13:50:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:32,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:32,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:32,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300075779] [2022-02-16 13:50:32,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300075779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:32,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911158849] [2022-02-16 13:50:32,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:32,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:32,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:32,481 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:32,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-16 13:50:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:32,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:50:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:33,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:33,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:33,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:33,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911158849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:33,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:33,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:50:33,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407967790] [2022-02-16 13:50:33,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:33,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:33,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:33,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:33,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:33,246 INFO L87 Difference]: Start difference. First operand 270 states and 743 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:33,753 INFO L93 Difference]: Finished difference Result 465 states and 1119 transitions. [2022-02-16 13:50:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:50:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:33,754 INFO L225 Difference]: With dead ends: 465 [2022-02-16 13:50:33,754 INFO L226 Difference]: Without dead ends: 464 [2022-02-16 13:50:33,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:50:33,755 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 241 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:33,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 146 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-02-16 13:50:33,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 267. [2022-02-16 13:50:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.763157894736842) internal successors, (735), 266 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 735 transitions. [2022-02-16 13:50:33,758 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 735 transitions. Word has length 20 [2022-02-16 13:50:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:33,758 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 735 transitions. [2022-02-16 13:50:33,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 735 transitions. [2022-02-16 13:50:33,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:33,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:33,759 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:33,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:33,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-02-16 13:50:33,975 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:33,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1294050984, now seen corresponding path program 188 times [2022-02-16 13:50:33,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:33,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283241406] [2022-02-16 13:50:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:33,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:34,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:34,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283241406] [2022-02-16 13:50:34,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283241406] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:34,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418689788] [2022-02-16 13:50:34,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:34,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:34,092 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:34,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-16 13:50:34,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:34,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:34,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:34,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:34,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:50:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:34,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:34,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:34,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:34,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418689788] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:34,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:34,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:50:34,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958683089] [2022-02-16 13:50:34,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:34,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:34,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:34,662 INFO L87 Difference]: Start difference. First operand 267 states and 735 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:35,043 INFO L93 Difference]: Finished difference Result 444 states and 1096 transitions. [2022-02-16 13:50:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:35,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:35,044 INFO L225 Difference]: With dead ends: 444 [2022-02-16 13:50:35,044 INFO L226 Difference]: Without dead ends: 444 [2022-02-16 13:50:35,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:50:35,044 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:35,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 126 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-02-16 13:50:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 267. [2022-02-16 13:50:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7706766917293235) internal successors, (737), 266 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 737 transitions. [2022-02-16 13:50:35,048 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 737 transitions. Word has length 20 [2022-02-16 13:50:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:35,048 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 737 transitions. [2022-02-16 13:50:35,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 737 transitions. [2022-02-16 13:50:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:35,048 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:35,048 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:35,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-02-16 13:50:35,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-02-16 13:50:35,263 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:35,264 INFO L85 PathProgramCache]: Analyzing trace with hash -604329060, now seen corresponding path program 189 times [2022-02-16 13:50:35,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:35,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119776051] [2022-02-16 13:50:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:35,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:35,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:35,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119776051] [2022-02-16 13:50:35,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119776051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:35,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909100729] [2022-02-16 13:50:35,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:35,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:35,350 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:35,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-16 13:50:35,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:50:35,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:35,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:35,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:50:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:35,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:35,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:35,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:35,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909100729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:35,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:35,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:50:35,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68505310] [2022-02-16 13:50:35,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:35,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:35,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:35,948 INFO L87 Difference]: Start difference. First operand 267 states and 737 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:36,388 INFO L93 Difference]: Finished difference Result 442 states and 1093 transitions. [2022-02-16 13:50:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:50:36,389 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:36,389 INFO L225 Difference]: With dead ends: 442 [2022-02-16 13:50:36,390 INFO L226 Difference]: Without dead ends: 442 [2022-02-16 13:50:36,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:50:36,390 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:36,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 140 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-02-16 13:50:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 265. [2022-02-16 13:50:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.757575757575758) internal successors, (728), 264 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 728 transitions. [2022-02-16 13:50:36,395 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 728 transitions. Word has length 20 [2022-02-16 13:50:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:36,395 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 728 transitions. [2022-02-16 13:50:36,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 728 transitions. [2022-02-16 13:50:36,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:36,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:36,395 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:36,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:36,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-02-16 13:50:36,612 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1048462992, now seen corresponding path program 190 times [2022-02-16 13:50:36,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:36,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005735429] [2022-02-16 13:50:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:36,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:36,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:36,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005735429] [2022-02-16 13:50:36,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005735429] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:36,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114133153] [2022-02-16 13:50:36,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:36,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:36,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:36,741 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:36,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-16 13:50:36,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:36,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:36,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:37,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:50:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:37,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:37,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:37,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:37,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114133153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:37,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:37,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:37,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965717334] [2022-02-16 13:50:37,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:37,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:37,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:37,439 INFO L87 Difference]: Start difference. First operand 265 states and 728 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:38,173 INFO L93 Difference]: Finished difference Result 446 states and 1099 transitions. [2022-02-16 13:50:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:50:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:38,174 INFO L225 Difference]: With dead ends: 446 [2022-02-16 13:50:38,174 INFO L226 Difference]: Without dead ends: 444 [2022-02-16 13:50:38,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:50:38,175 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 180 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:38,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 174 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-02-16 13:50:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 268. [2022-02-16 13:50:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.752808988764045) internal successors, (735), 267 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 735 transitions. [2022-02-16 13:50:38,178 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 735 transitions. Word has length 20 [2022-02-16 13:50:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:38,178 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 735 transitions. [2022-02-16 13:50:38,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 735 transitions. [2022-02-16 13:50:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:38,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:38,179 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:38,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:38,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:38,387 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:38,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2131406508, now seen corresponding path program 191 times [2022-02-16 13:50:38,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:38,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443257864] [2022-02-16 13:50:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:38,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:38,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:38,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443257864] [2022-02-16 13:50:38,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443257864] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:38,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86037087] [2022-02-16 13:50:38,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:38,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:38,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:38,507 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:38,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-16 13:50:38,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:50:38,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:38,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:38,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:50:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:38,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:39,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:39,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:39,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86037087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:39,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:39,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:50:39,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561578526] [2022-02-16 13:50:39,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:39,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:39,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:39,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:39,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:39,111 INFO L87 Difference]: Start difference. First operand 268 states and 735 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:39,595 INFO L93 Difference]: Finished difference Result 435 states and 1089 transitions. [2022-02-16 13:50:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:39,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:39,596 INFO L225 Difference]: With dead ends: 435 [2022-02-16 13:50:39,596 INFO L226 Difference]: Without dead ends: 435 [2022-02-16 13:50:39,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:50:39,596 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:39,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 132 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-02-16 13:50:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 264. [2022-02-16 13:50:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7490494296577945) internal successors, (723), 263 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 723 transitions. [2022-02-16 13:50:39,599 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 723 transitions. Word has length 20 [2022-02-16 13:50:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:39,599 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 723 transitions. [2022-02-16 13:50:39,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 723 transitions. [2022-02-16 13:50:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:39,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:39,600 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:39,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-02-16 13:50:39,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:39,801 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1272258946, now seen corresponding path program 192 times [2022-02-16 13:50:39,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:39,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798632046] [2022-02-16 13:50:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:39,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:39,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:39,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798632046] [2022-02-16 13:50:39,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798632046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:39,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127789150] [2022-02-16 13:50:39,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:39,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:39,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:39,899 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:39,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-16 13:50:40,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:50:40,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:40,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:40,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:40,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:40,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:40,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:40,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127789150] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:40,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:40,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:50:40,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022024058] [2022-02-16 13:50:40,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:40,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:40,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:40,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:40,563 INFO L87 Difference]: Start difference. First operand 264 states and 723 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:41,008 INFO L93 Difference]: Finished difference Result 404 states and 1031 transitions. [2022-02-16 13:50:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:41,008 INFO L225 Difference]: With dead ends: 404 [2022-02-16 13:50:41,009 INFO L226 Difference]: Without dead ends: 401 [2022-02-16 13:50:41,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:41,009 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:41,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 63 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-16 13:50:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 265. [2022-02-16 13:50:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.746212121212121) internal successors, (725), 264 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 725 transitions. [2022-02-16 13:50:41,012 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 725 transitions. Word has length 20 [2022-02-16 13:50:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:41,012 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 725 transitions. [2022-02-16 13:50:41,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 725 transitions. [2022-02-16 13:50:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:41,013 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:41,013 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:41,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:41,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:41,223 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1063965638, now seen corresponding path program 193 times [2022-02-16 13:50:41,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:41,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192354721] [2022-02-16 13:50:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:41,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:41,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:41,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192354721] [2022-02-16 13:50:41,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192354721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:41,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629001478] [2022-02-16 13:50:41,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:41,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:41,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:41,313 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:41,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-16 13:50:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:41,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:41,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:50:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:41,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:41,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:41,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:41,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629001478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:41,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:41,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:50:41,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297531739] [2022-02-16 13:50:41,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:41,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:50:41,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:41,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:50:41,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:50:41,979 INFO L87 Difference]: Start difference. First operand 265 states and 725 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:42,694 INFO L93 Difference]: Finished difference Result 417 states and 1048 transitions. [2022-02-16 13:50:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:42,694 INFO L225 Difference]: With dead ends: 417 [2022-02-16 13:50:42,695 INFO L226 Difference]: Without dead ends: 415 [2022-02-16 13:50:42,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:50:42,695 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:42,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 145 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:42,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-02-16 13:50:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 268. [2022-02-16 13:50:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.741573033707865) internal successors, (732), 267 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 732 transitions. [2022-02-16 13:50:42,698 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 732 transitions. Word has length 20 [2022-02-16 13:50:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:42,698 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 732 transitions. [2022-02-16 13:50:42,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 732 transitions. [2022-02-16 13:50:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:42,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:42,699 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:42,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-02-16 13:50:42,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-02-16 13:50:42,900 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash 51132158, now seen corresponding path program 194 times [2022-02-16 13:50:42,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:42,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523927524] [2022-02-16 13:50:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:42,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:43,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:43,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523927524] [2022-02-16 13:50:43,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523927524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:43,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867533232] [2022-02-16 13:50:43,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:43,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:43,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:43,030 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:43,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-16 13:50:43,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:43,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:43,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:43,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:50:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:43,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:43,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:43,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:43,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867533232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:43,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:43,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:50:43,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604271920] [2022-02-16 13:50:43,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:43,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:43,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:43,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:43,847 INFO L87 Difference]: Start difference. First operand 268 states and 732 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:44,293 INFO L93 Difference]: Finished difference Result 404 states and 1034 transitions. [2022-02-16 13:50:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:44,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:44,294 INFO L225 Difference]: With dead ends: 404 [2022-02-16 13:50:44,294 INFO L226 Difference]: Without dead ends: 404 [2022-02-16 13:50:44,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:50:44,295 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:44,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 115 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-16 13:50:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 263. [2022-02-16 13:50:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7404580152671754) internal successors, (718), 262 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 718 transitions. [2022-02-16 13:50:44,298 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 718 transitions. Word has length 20 [2022-02-16 13:50:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:44,298 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 718 transitions. [2022-02-16 13:50:44,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 718 transitions. [2022-02-16 13:50:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:44,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:44,298 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:44,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-02-16 13:50:44,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:44,500 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1091197742, now seen corresponding path program 195 times [2022-02-16 13:50:44,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:44,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693536076] [2022-02-16 13:50:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:44,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:44,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:44,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693536076] [2022-02-16 13:50:44,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693536076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:44,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427063234] [2022-02-16 13:50:44,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:44,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:44,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:44,579 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:44,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-16 13:50:44,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:50:44,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:44,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:44,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:45,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:45,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:45,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427063234] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:45,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:45,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:50:45,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153178806] [2022-02-16 13:50:45,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:45,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:50:45,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:45,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:50:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:50:45,154 INFO L87 Difference]: Start difference. First operand 263 states and 718 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:45,496 INFO L93 Difference]: Finished difference Result 441 states and 1082 transitions. [2022-02-16 13:50:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:45,497 INFO L225 Difference]: With dead ends: 441 [2022-02-16 13:50:45,497 INFO L226 Difference]: Without dead ends: 437 [2022-02-16 13:50:45,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:45,498 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 104 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:45,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 85 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-02-16 13:50:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 264. [2022-02-16 13:50:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7376425855513307) internal successors, (720), 263 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 720 transitions. [2022-02-16 13:50:45,501 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 720 transitions. Word has length 20 [2022-02-16 13:50:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:45,501 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 720 transitions. [2022-02-16 13:50:45,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 720 transitions. [2022-02-16 13:50:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:45,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:45,502 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:45,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:45,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:45,711 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:45,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:45,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1749774642, now seen corresponding path program 196 times [2022-02-16 13:50:45,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:45,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332961631] [2022-02-16 13:50:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:45,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:45,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:45,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332961631] [2022-02-16 13:50:45,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332961631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:45,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616870987] [2022-02-16 13:50:45,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:45,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:45,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:45,794 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:45,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-16 13:50:45,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:45,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:45,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:45,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:46,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:46,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:46,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:46,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:46,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616870987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:46,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:46,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:50:46,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431639906] [2022-02-16 13:50:46,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:46,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:50:46,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:46,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:50:46,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:50:46,394 INFO L87 Difference]: Start difference. First operand 264 states and 720 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:46,774 INFO L93 Difference]: Finished difference Result 430 states and 1072 transitions. [2022-02-16 13:50:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:46,775 INFO L225 Difference]: With dead ends: 430 [2022-02-16 13:50:46,775 INFO L226 Difference]: Without dead ends: 427 [2022-02-16 13:50:46,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:50:46,775 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:46,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 112 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-02-16 13:50:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 265. [2022-02-16 13:50:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.734848484848485) internal successors, (722), 264 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 722 transitions. [2022-02-16 13:50:46,778 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 722 transitions. Word has length 20 [2022-02-16 13:50:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:46,779 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 722 transitions. [2022-02-16 13:50:46,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 722 transitions. [2022-02-16 13:50:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:46,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:46,779 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:46,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:46,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:46,995 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:46,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:46,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1958067950, now seen corresponding path program 197 times [2022-02-16 13:50:46,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:46,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621628382] [2022-02-16 13:50:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:46,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:47,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:47,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621628382] [2022-02-16 13:50:47,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621628382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:47,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235407871] [2022-02-16 13:50:47,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:47,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:47,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:47,105 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:47,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-16 13:50:47,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:47,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:47,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:47,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:47,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:50:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:47,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:47,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:47,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:47,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235407871] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:47,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:47,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:47,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472988808] [2022-02-16 13:50:47,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:47,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:47,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:47,790 INFO L87 Difference]: Start difference. First operand 265 states and 722 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:48,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:48,519 INFO L93 Difference]: Finished difference Result 443 states and 1089 transitions. [2022-02-16 13:50:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:48,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:48,520 INFO L225 Difference]: With dead ends: 443 [2022-02-16 13:50:48,520 INFO L226 Difference]: Without dead ends: 441 [2022-02-16 13:50:48,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:50:48,521 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 148 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:48,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 138 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-02-16 13:50:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 268. [2022-02-16 13:50:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.730337078651685) internal successors, (729), 267 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 729 transitions. [2022-02-16 13:50:48,524 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 729 transitions. Word has length 20 [2022-02-16 13:50:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:48,524 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 729 transitions. [2022-02-16 13:50:48,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 729 transitions. [2022-02-16 13:50:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:48,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:48,525 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:48,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-02-16 13:50:48,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:48,725 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1221801550, now seen corresponding path program 198 times [2022-02-16 13:50:48,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:48,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943768921] [2022-02-16 13:50:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:48,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:48,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:48,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943768921] [2022-02-16 13:50:48,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943768921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:48,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280399955] [2022-02-16 13:50:48,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:48,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:48,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:48,820 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:48,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-16 13:50:48,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:50:48,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:49,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:50:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:49,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:49,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:49,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:49,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280399955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:49,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:49,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:50:49,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834044393] [2022-02-16 13:50:49,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:49,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:50:49,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:49,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:50:49,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:50:49,575 INFO L87 Difference]: Start difference. First operand 268 states and 729 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:50,018 INFO L93 Difference]: Finished difference Result 430 states and 1075 transitions. [2022-02-16 13:50:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:50,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:50,019 INFO L225 Difference]: With dead ends: 430 [2022-02-16 13:50:50,019 INFO L226 Difference]: Without dead ends: 430 [2022-02-16 13:50:50,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:50:50,020 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:50,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 92 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-02-16 13:50:50,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 262. [2022-02-16 13:50:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.731800766283525) internal successors, (713), 261 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 713 transitions. [2022-02-16 13:50:50,023 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 713 transitions. Word has length 20 [2022-02-16 13:50:50,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:50,023 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 713 transitions. [2022-02-16 13:50:50,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 713 transitions. [2022-02-16 13:50:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:50,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:50,024 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:50,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-02-16 13:50:50,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-02-16 13:50:50,235 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:50,235 INFO L85 PathProgramCache]: Analyzing trace with hash 361751324, now seen corresponding path program 199 times [2022-02-16 13:50:50,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:50,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030926511] [2022-02-16 13:50:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:50,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:50,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:50,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030926511] [2022-02-16 13:50:50,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030926511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:50,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893994181] [2022-02-16 13:50:50,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:50,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:50,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:50,344 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:50,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-16 13:50:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:50,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:50:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:50,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:51,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:51,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:51,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893994181] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:51,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:51,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:50:51,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131079422] [2022-02-16 13:50:51,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:51,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:51,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:51,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:51,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:51,240 INFO L87 Difference]: Start difference. First operand 262 states and 713 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:51,558 INFO L93 Difference]: Finished difference Result 331 states and 857 transitions. [2022-02-16 13:50:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:51,559 INFO L225 Difference]: With dead ends: 331 [2022-02-16 13:50:51,559 INFO L226 Difference]: Without dead ends: 331 [2022-02-16 13:50:51,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:50:51,559 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:51,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 82 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-16 13:50:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 267. [2022-02-16 13:50:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7406015037593985) internal successors, (729), 266 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 729 transitions. [2022-02-16 13:50:51,562 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 729 transitions. Word has length 20 [2022-02-16 13:50:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:51,562 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 729 transitions. [2022-02-16 13:50:51,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 729 transitions. [2022-02-16 13:50:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:51,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:51,563 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:51,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:51,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-16 13:50:51,779 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:51,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1076284180, now seen corresponding path program 200 times [2022-02-16 13:50:51,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:51,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131534950] [2022-02-16 13:50:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:51,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:51,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:51,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131534950] [2022-02-16 13:50:51,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131534950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:51,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397566928] [2022-02-16 13:50:51,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:50:51,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:51,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:51,880 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:51,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-16 13:50:51,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:52,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:50:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:52,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:52,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:52,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:52,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397566928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:52,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:52,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:52,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143608767] [2022-02-16 13:50:52,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:52,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:52,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:52,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:52,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:52,715 INFO L87 Difference]: Start difference. First operand 267 states and 729 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:53,172 INFO L93 Difference]: Finished difference Result 332 states and 857 transitions. [2022-02-16 13:50:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:50:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:53,172 INFO L225 Difference]: With dead ends: 332 [2022-02-16 13:50:53,173 INFO L226 Difference]: Without dead ends: 331 [2022-02-16 13:50:53,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:50:53,173 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 84 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:53,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 94 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:53,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-16 13:50:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 266. [2022-02-16 13:50:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.739622641509434) internal successors, (726), 265 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 726 transitions. [2022-02-16 13:50:53,176 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 726 transitions. Word has length 20 [2022-02-16 13:50:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:53,176 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 726 transitions. [2022-02-16 13:50:53,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 726 transitions. [2022-02-16 13:50:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:53,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:53,176 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:53,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-02-16 13:50:53,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-02-16 13:50:53,381 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:53,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:53,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1664029502, now seen corresponding path program 201 times [2022-02-16 13:50:53,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:53,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114365278] [2022-02-16 13:50:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:53,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:53,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:53,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114365278] [2022-02-16 13:50:53,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114365278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:53,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481365375] [2022-02-16 13:50:53,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:50:53,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:53,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:53,491 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:53,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-16 13:50:53,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:50:53,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:53,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:53,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:53,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:50:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:53,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:54,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:54,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:54,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481365375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:54,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:54,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:54,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646322244] [2022-02-16 13:50:54,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:54,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:54,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:54,257 INFO L87 Difference]: Start difference. First operand 266 states and 726 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:54,639 INFO L93 Difference]: Finished difference Result 319 states and 840 transitions. [2022-02-16 13:50:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:54,640 INFO L225 Difference]: With dead ends: 319 [2022-02-16 13:50:54,640 INFO L226 Difference]: Without dead ends: 317 [2022-02-16 13:50:54,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:50:54,641 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:54,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:50:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-16 13:50:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 264. [2022-02-16 13:50:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7452471482889735) internal successors, (722), 263 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 722 transitions. [2022-02-16 13:50:54,644 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 722 transitions. Word has length 20 [2022-02-16 13:50:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:54,644 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 722 transitions. [2022-02-16 13:50:54,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 722 transitions. [2022-02-16 13:50:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:54,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:54,644 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:54,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-02-16 13:50:54,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-02-16 13:50:54,848 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1771090720, now seen corresponding path program 202 times [2022-02-16 13:50:54,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:54,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808792959] [2022-02-16 13:50:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:54,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:54,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:54,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808792959] [2022-02-16 13:50:54,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808792959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:54,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692934385] [2022-02-16 13:50:54,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:50:54,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:54,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:54,975 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:54,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-16 13:50:55,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:50:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:55,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:55,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:50:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:55,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:55,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:55,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:55,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692934385] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:55,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:55,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:50:55,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471210499] [2022-02-16 13:50:55,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:55,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:55,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:55,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:55,848 INFO L87 Difference]: Start difference. First operand 264 states and 722 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:56,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:56,410 INFO L93 Difference]: Finished difference Result 372 states and 923 transitions. [2022-02-16 13:50:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:50:56,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:56,411 INFO L225 Difference]: With dead ends: 372 [2022-02-16 13:50:56,411 INFO L226 Difference]: Without dead ends: 372 [2022-02-16 13:50:56,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:50:56,411 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 176 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:56,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 126 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-16 13:50:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 270. [2022-02-16 13:50:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.758364312267658) internal successors, (742), 269 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 742 transitions. [2022-02-16 13:50:56,414 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 742 transitions. Word has length 20 [2022-02-16 13:50:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:56,415 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 742 transitions. [2022-02-16 13:50:56,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 742 transitions. [2022-02-16 13:50:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:56,415 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:56,415 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:56,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:56,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:56,628 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1056557864, now seen corresponding path program 203 times [2022-02-16 13:50:56,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:56,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181532044] [2022-02-16 13:50:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:56,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:56,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:56,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181532044] [2022-02-16 13:50:56,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181532044] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:56,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639463031] [2022-02-16 13:50:56,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:50:56,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:56,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:56,779 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:56,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-16 13:50:56,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:50:56,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:56,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:57,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-02-16 13:50:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:57,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:57,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:57,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:57,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639463031] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:57,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:57,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:50:57,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600976713] [2022-02-16 13:50:57,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:57,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:50:57,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:57,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:50:57,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:50:57,544 INFO L87 Difference]: Start difference. First operand 270 states and 742 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:58,124 INFO L93 Difference]: Finished difference Result 382 states and 931 transitions. [2022-02-16 13:50:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:50:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:58,125 INFO L225 Difference]: With dead ends: 382 [2022-02-16 13:50:58,125 INFO L226 Difference]: Without dead ends: 381 [2022-02-16 13:50:58,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:50:58,125 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 208 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:58,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 141 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-02-16 13:50:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 267. [2022-02-16 13:50:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7593984962406015) internal successors, (734), 266 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 734 transitions. [2022-02-16 13:50:58,129 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 734 transitions. Word has length 20 [2022-02-16 13:50:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:58,129 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 734 transitions. [2022-02-16 13:50:58,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 734 transitions. [2022-02-16 13:50:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:58,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:58,129 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:58,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:58,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-02-16 13:50:58,346 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1562797412, now seen corresponding path program 204 times [2022-02-16 13:50:58,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:58,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287861001] [2022-02-16 13:50:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:58,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:58,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:58,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287861001] [2022-02-16 13:50:58,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287861001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:58,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313908773] [2022-02-16 13:50:58,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:50:58,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:58,468 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:58,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-16 13:50:58,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:50:58,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:50:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:50:58,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:50:58,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:50:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:58,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:50:59,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:50:59,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:50:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:59,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313908773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:50:59,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:50:59,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:50:59,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267102066] [2022-02-16 13:50:59,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:50:59,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:50:59,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:50:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:50:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:50:59,273 INFO L87 Difference]: Start difference. First operand 267 states and 734 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:50:59,604 INFO L93 Difference]: Finished difference Result 361 states and 908 transitions. [2022-02-16 13:50:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:50:59,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:50:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:50:59,604 INFO L225 Difference]: With dead ends: 361 [2022-02-16 13:50:59,604 INFO L226 Difference]: Without dead ends: 361 [2022-02-16 13:50:59,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:50:59,605 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 123 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:50:59,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 124 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:50:59,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-16 13:50:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 267. [2022-02-16 13:50:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7669172932330826) internal successors, (736), 266 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 736 transitions. [2022-02-16 13:50:59,608 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 736 transitions. Word has length 20 [2022-02-16 13:50:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:50:59,608 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 736 transitions. [2022-02-16 13:50:59,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:50:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 736 transitions. [2022-02-16 13:50:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:50:59,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:50:59,609 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:50:59,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-02-16 13:50:59,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-02-16 13:50:59,810 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:50:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:50:59,811 INFO L85 PathProgramCache]: Analyzing trace with hash -873075488, now seen corresponding path program 205 times [2022-02-16 13:50:59,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:50:59,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864522615] [2022-02-16 13:50:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:50:59,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:50:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:50:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:50:59,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:50:59,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864522615] [2022-02-16 13:50:59,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864522615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:50:59,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330152496] [2022-02-16 13:50:59,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:50:59,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:50:59,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:50:59,921 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:50:59,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-16 13:51:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:00,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:00,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:00,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:51:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:00,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:00,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:00,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:00,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330152496] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:00,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:00,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:51:00,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293082651] [2022-02-16 13:51:00,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:00,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:51:00,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:00,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:51:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:00,458 INFO L87 Difference]: Start difference. First operand 267 states and 736 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:00,815 INFO L93 Difference]: Finished difference Result 371 states and 919 transitions. [2022-02-16 13:51:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:00,816 INFO L225 Difference]: With dead ends: 371 [2022-02-16 13:51:00,816 INFO L226 Difference]: Without dead ends: 371 [2022-02-16 13:51:00,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:51:00,816 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:00,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 165 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-16 13:51:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 265. [2022-02-16 13:51:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.753787878787879) internal successors, (727), 264 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 727 transitions. [2022-02-16 13:51:00,834 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 727 transitions. Word has length 20 [2022-02-16 13:51:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:00,835 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 727 transitions. [2022-02-16 13:51:00,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 727 transitions. [2022-02-16 13:51:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:00,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:00,835 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:00,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:01,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:01,055 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:01,055 INFO L85 PathProgramCache]: Analyzing trace with hash 779716564, now seen corresponding path program 206 times [2022-02-16 13:51:01,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:01,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183220215] [2022-02-16 13:51:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:01,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:01,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:01,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183220215] [2022-02-16 13:51:01,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183220215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:01,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529036430] [2022-02-16 13:51:01,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:01,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:01,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:01,130 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:01,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-16 13:51:01,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:01,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:01,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:51:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:01,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:01,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:01,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:01,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529036430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:01,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:01,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:51:01,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954006657] [2022-02-16 13:51:01,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:01,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:01,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:01,762 INFO L87 Difference]: Start difference. First operand 265 states and 727 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:02,336 INFO L93 Difference]: Finished difference Result 363 states and 911 transitions. [2022-02-16 13:51:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:51:02,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:02,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:02,337 INFO L225 Difference]: With dead ends: 363 [2022-02-16 13:51:02,337 INFO L226 Difference]: Without dead ends: 361 [2022-02-16 13:51:02,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:51:02,337 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:02,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 137 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-16 13:51:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 268. [2022-02-16 13:51:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.749063670411985) internal successors, (734), 267 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 734 transitions. [2022-02-16 13:51:02,340 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 734 transitions. Word has length 20 [2022-02-16 13:51:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:02,340 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 734 transitions. [2022-02-16 13:51:02,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 734 transitions. [2022-02-16 13:51:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:02,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:02,341 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:02,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:02,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2022-02-16 13:51:02,551 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:02,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1894814360, now seen corresponding path program 207 times [2022-02-16 13:51:02,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:02,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754254845] [2022-02-16 13:51:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:02,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:02,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:02,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754254845] [2022-02-16 13:51:02,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754254845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:02,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77933753] [2022-02-16 13:51:02,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:02,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:02,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:02,687 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:02,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-16 13:51:02,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:51:02,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:02,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:02,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:03,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:51:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:03,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:03,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:03,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:03,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77933753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:03,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:03,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:51:03,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472479852] [2022-02-16 13:51:03,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:03,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:51:03,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:51:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:03,425 INFO L87 Difference]: Start difference. First operand 268 states and 734 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:03,808 INFO L93 Difference]: Finished difference Result 352 states and 901 transitions. [2022-02-16 13:51:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:03,808 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:03,809 INFO L225 Difference]: With dead ends: 352 [2022-02-16 13:51:03,809 INFO L226 Difference]: Without dead ends: 352 [2022-02-16 13:51:03,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:51:03,809 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:03,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 106 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-16 13:51:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 264. [2022-02-16 13:51:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7452471482889735) internal successors, (722), 263 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 722 transitions. [2022-02-16 13:51:03,812 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 722 transitions. Word has length 20 [2022-02-16 13:51:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:03,813 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 722 transitions. [2022-02-16 13:51:03,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 722 transitions. [2022-02-16 13:51:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:03,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:03,813 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:03,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:04,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:04,030 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1541005374, now seen corresponding path program 208 times [2022-02-16 13:51:04,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:04,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722705438] [2022-02-16 13:51:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:04,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:04,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:04,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722705438] [2022-02-16 13:51:04,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722705438] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:04,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412340502] [2022-02-16 13:51:04,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:04,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:04,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:04,105 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:04,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-16 13:51:04,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:04,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:04,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:04,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:04,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:04,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:04,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412340502] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:04,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:04,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:51:04,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780781797] [2022-02-16 13:51:04,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:04,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:04,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:04,715 INFO L87 Difference]: Start difference. First operand 264 states and 722 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:04,943 INFO L93 Difference]: Finished difference Result 321 states and 843 transitions. [2022-02-16 13:51:04,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:04,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:04,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:04,944 INFO L225 Difference]: With dead ends: 321 [2022-02-16 13:51:04,944 INFO L226 Difference]: Without dead ends: 318 [2022-02-16 13:51:04,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:04,944 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:04,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 73 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-16 13:51:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 265. [2022-02-16 13:51:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.742424242424242) internal successors, (724), 264 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 724 transitions. [2022-02-16 13:51:04,952 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 724 transitions. Word has length 20 [2022-02-16 13:51:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:04,952 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 724 transitions. [2022-02-16 13:51:04,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 724 transitions. [2022-02-16 13:51:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:04,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:04,953 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:04,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-02-16 13:51:05,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-02-16 13:51:05,155 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1332712066, now seen corresponding path program 209 times [2022-02-16 13:51:05,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:05,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151669177] [2022-02-16 13:51:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:05,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:05,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:05,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151669177] [2022-02-16 13:51:05,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151669177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:05,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600949923] [2022-02-16 13:51:05,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:05,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:05,248 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:05,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-16 13:51:05,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:05,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:05,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:51:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:05,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:05,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:05,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:05,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600949923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:05,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:05,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:51:05,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785045919] [2022-02-16 13:51:05,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:05,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:51:05,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:05,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:51:05,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:51:05,986 INFO L87 Difference]: Start difference. First operand 265 states and 724 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:06,344 INFO L93 Difference]: Finished difference Result 334 states and 860 transitions. [2022-02-16 13:51:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:06,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:06,344 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:51:06,344 INFO L226 Difference]: Without dead ends: 332 [2022-02-16 13:51:06,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:51:06,345 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:06,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 108 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-16 13:51:06,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 268. [2022-02-16 13:51:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.737827715355805) internal successors, (731), 267 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 731 transitions. [2022-02-16 13:51:06,348 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 731 transitions. Word has length 20 [2022-02-16 13:51:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:06,348 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 731 transitions. [2022-02-16 13:51:06,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 731 transitions. [2022-02-16 13:51:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:06,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:06,348 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:06,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:06,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-16 13:51:06,565 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:06,565 INFO L85 PathProgramCache]: Analyzing trace with hash -217614270, now seen corresponding path program 210 times [2022-02-16 13:51:06,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:06,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004930082] [2022-02-16 13:51:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:06,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:06,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:06,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004930082] [2022-02-16 13:51:06,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004930082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:06,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890948669] [2022-02-16 13:51:06,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:06,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:06,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:06,642 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:06,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-16 13:51:06,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:51:06,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:06,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:07,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:51:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:07,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:07,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:07,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:07,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890948669] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:07,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:07,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:51:07,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187417134] [2022-02-16 13:51:07,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:07,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:07,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:07,316 INFO L87 Difference]: Start difference. First operand 268 states and 731 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:07,531 INFO L93 Difference]: Finished difference Result 321 states and 846 transitions. [2022-02-16 13:51:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:07,532 INFO L225 Difference]: With dead ends: 321 [2022-02-16 13:51:07,532 INFO L226 Difference]: Without dead ends: 321 [2022-02-16 13:51:07,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:07,532 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:07,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-16 13:51:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 263. [2022-02-16 13:51:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.736641221374046) internal successors, (717), 262 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 717 transitions. [2022-02-16 13:51:07,535 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 717 transitions. Word has length 20 [2022-02-16 13:51:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:07,535 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 717 transitions. [2022-02-16 13:51:07,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 717 transitions. [2022-02-16 13:51:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:07,536 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:07,536 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:07,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:07,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-02-16 13:51:07,752 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1887409722, now seen corresponding path program 211 times [2022-02-16 13:51:07,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:07,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348791262] [2022-02-16 13:51:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:07,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:07,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:07,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348791262] [2022-02-16 13:51:07,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348791262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:07,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271024510] [2022-02-16 13:51:07,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:07,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:07,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:07,821 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:07,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-16 13:51:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:07,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:07,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:08,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:51:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:08,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:08,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:08,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:08,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271024510] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:08,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:08,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:51:08,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326690101] [2022-02-16 13:51:08,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:08,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:08,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:08,534 INFO L87 Difference]: Start difference. First operand 263 states and 717 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:08,784 INFO L93 Difference]: Finished difference Result 358 states and 907 transitions. [2022-02-16 13:51:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:08,784 INFO L225 Difference]: With dead ends: 358 [2022-02-16 13:51:08,784 INFO L226 Difference]: Without dead ends: 358 [2022-02-16 13:51:08,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:51:08,785 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:08,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 87 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-16 13:51:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2022-02-16 13:51:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.762962962962963) internal successors, (746), 270 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 746 transitions. [2022-02-16 13:51:08,788 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 746 transitions. Word has length 20 [2022-02-16 13:51:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:08,788 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 746 transitions. [2022-02-16 13:51:08,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 746 transitions. [2022-02-16 13:51:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:08,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:08,788 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:08,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:09,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-16 13:51:09,002 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:09,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1693024718, now seen corresponding path program 212 times [2022-02-16 13:51:09,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:09,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292416584] [2022-02-16 13:51:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:09,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:09,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:09,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292416584] [2022-02-16 13:51:09,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292416584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:09,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856604965] [2022-02-16 13:51:09,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:09,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:09,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:09,127 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:09,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-16 13:51:09,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:09,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:09,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:09,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:09,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:51:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:09,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:09,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:09,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:09,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856604965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:09,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:09,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:51:09,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263835846] [2022-02-16 13:51:09,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:09,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:51:09,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:51:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:51:09,731 INFO L87 Difference]: Start difference. First operand 271 states and 746 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:10,042 INFO L93 Difference]: Finished difference Result 368 states and 915 transitions. [2022-02-16 13:51:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:51:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:10,043 INFO L225 Difference]: With dead ends: 368 [2022-02-16 13:51:10,043 INFO L226 Difference]: Without dead ends: 367 [2022-02-16 13:51:10,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:51:10,043 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 149 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:10,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 102 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-16 13:51:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 268. [2022-02-16 13:51:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.764044943820225) internal successors, (738), 267 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 738 transitions. [2022-02-16 13:51:10,046 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 738 transitions. Word has length 20 [2022-02-16 13:51:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:10,046 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 738 transitions. [2022-02-16 13:51:10,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 738 transitions. [2022-02-16 13:51:10,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:10,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:10,047 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:10,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:10,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-02-16 13:51:10,255 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:10,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2095703030, now seen corresponding path program 213 times [2022-02-16 13:51:10,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:10,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158687171] [2022-02-16 13:51:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:10,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:10,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:10,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158687171] [2022-02-16 13:51:10,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158687171] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:10,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775871615] [2022-02-16 13:51:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:10,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:10,364 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:10,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-16 13:51:10,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:51:10,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:10,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:10,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:10,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:51:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:10,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:10,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:10,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:11,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775871615] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:11,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:11,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:51:11,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716761254] [2022-02-16 13:51:11,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:11,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:11,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:11,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:11,070 INFO L87 Difference]: Start difference. First operand 268 states and 738 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:11,417 INFO L93 Difference]: Finished difference Result 385 states and 950 transitions. [2022-02-16 13:51:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:11,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:11,418 INFO L225 Difference]: With dead ends: 385 [2022-02-16 13:51:11,418 INFO L226 Difference]: Without dead ends: 385 [2022-02-16 13:51:11,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:51:11,431 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:11,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 105 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-02-16 13:51:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 270. [2022-02-16 13:51:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.7769516728624537) internal successors, (747), 269 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 747 transitions. [2022-02-16 13:51:11,435 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 747 transitions. Word has length 20 [2022-02-16 13:51:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:11,435 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 747 transitions. [2022-02-16 13:51:11,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 747 transitions. [2022-02-16 13:51:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:11,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:11,435 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:11,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:11,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-02-16 13:51:11,636 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1509542342, now seen corresponding path program 214 times [2022-02-16 13:51:11,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:11,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205187692] [2022-02-16 13:51:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:11,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:11,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:11,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205187692] [2022-02-16 13:51:11,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205187692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:11,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684023125] [2022-02-16 13:51:11,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:11,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:11,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:11,785 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:11,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-16 13:51:11,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:12,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:51:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:12,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:12,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:12,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:12,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684023125] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:12,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:12,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:51:12,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666262459] [2022-02-16 13:51:12,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:12,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:51:12,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:51:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:12,600 INFO L87 Difference]: Start difference. First operand 270 states and 747 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:13,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:13,192 INFO L93 Difference]: Finished difference Result 395 states and 961 transitions. [2022-02-16 13:51:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:51:13,193 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:13,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:13,193 INFO L225 Difference]: With dead ends: 395 [2022-02-16 13:51:13,193 INFO L226 Difference]: Without dead ends: 395 [2022-02-16 13:51:13,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-02-16 13:51:13,194 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:13,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 161 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:13,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-16 13:51:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 268. [2022-02-16 13:51:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.764044943820225) internal successors, (738), 267 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 738 transitions. [2022-02-16 13:51:13,197 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 738 transitions. Word has length 20 [2022-02-16 13:51:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:13,197 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 738 transitions. [2022-02-16 13:51:13,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 738 transitions. [2022-02-16 13:51:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:13,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:13,198 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:13,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:13,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:13,409 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash 143249710, now seen corresponding path program 215 times [2022-02-16 13:51:13,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:13,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438370662] [2022-02-16 13:51:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:13,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:13,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:13,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438370662] [2022-02-16 13:51:13,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438370662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:13,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209596756] [2022-02-16 13:51:13,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:13,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:13,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:13,506 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:13,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-16 13:51:13,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:51:13,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:13,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:13,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:13,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:51:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:13,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:14,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:14,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:14,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209596756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:14,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:14,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:51:14,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284625497] [2022-02-16 13:51:14,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:14,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:51:14,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:14,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:51:14,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:51:14,226 INFO L87 Difference]: Start difference. First operand 268 states and 738 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:14,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:14,581 INFO L93 Difference]: Finished difference Result 384 states and 946 transitions. [2022-02-16 13:51:14,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:14,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:14,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:14,582 INFO L225 Difference]: With dead ends: 384 [2022-02-16 13:51:14,582 INFO L226 Difference]: Without dead ends: 382 [2022-02-16 13:51:14,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:51:14,582 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:14,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 113 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-02-16 13:51:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 271. [2022-02-16 13:51:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.759259259259259) internal successors, (745), 270 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 745 transitions. [2022-02-16 13:51:14,585 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 745 transitions. Word has length 20 [2022-02-16 13:51:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:14,585 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 745 transitions. [2022-02-16 13:51:14,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 745 transitions. [2022-02-16 13:51:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:14,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:14,586 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:14,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-02-16 13:51:14,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:14,803 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1258347506, now seen corresponding path program 216 times [2022-02-16 13:51:14,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:14,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308262417] [2022-02-16 13:51:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:14,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:14,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:14,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308262417] [2022-02-16 13:51:14,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308262417] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:14,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795308151] [2022-02-16 13:51:14,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:14,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:14,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:14,896 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:14,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-16 13:51:15,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:51:15,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:15,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:15,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:15,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:51:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:15,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:15,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:15,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:15,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795308151] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:15,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:15,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:51:15,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632390411] [2022-02-16 13:51:15,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:15,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:15,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:15,594 INFO L87 Difference]: Start difference. First operand 271 states and 745 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:15,955 INFO L93 Difference]: Finished difference Result 377 states and 944 transitions. [2022-02-16 13:51:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:15,956 INFO L225 Difference]: With dead ends: 377 [2022-02-16 13:51:15,956 INFO L226 Difference]: Without dead ends: 377 [2022-02-16 13:51:15,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:51:15,956 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:15,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 129 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-16 13:51:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 269. [2022-02-16 13:51:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.753731343283582) internal successors, (738), 268 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 738 transitions. [2022-02-16 13:51:15,959 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 738 transitions. Word has length 20 [2022-02-16 13:51:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:15,960 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 738 transitions. [2022-02-16 13:51:15,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 738 transitions. [2022-02-16 13:51:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:15,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:15,960 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:15,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:16,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-02-16 13:51:16,176 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:16,177 INFO L85 PathProgramCache]: Analyzing trace with hash 828245852, now seen corresponding path program 217 times [2022-02-16 13:51:16,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:16,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601966342] [2022-02-16 13:51:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:16,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:16,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:16,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601966342] [2022-02-16 13:51:16,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601966342] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:16,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732609326] [2022-02-16 13:51:16,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:16,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:16,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:16,303 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:16,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-16 13:51:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:16,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:16,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:16,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:51:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:16,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:17,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:17,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:17,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732609326] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:17,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:17,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:51:17,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795512497] [2022-02-16 13:51:17,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:17,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:51:17,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:51:17,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:17,147 INFO L87 Difference]: Start difference. First operand 269 states and 738 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:17,528 INFO L93 Difference]: Finished difference Result 354 states and 906 transitions. [2022-02-16 13:51:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:17,528 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:17,528 INFO L225 Difference]: With dead ends: 354 [2022-02-16 13:51:17,528 INFO L226 Difference]: Without dead ends: 354 [2022-02-16 13:51:17,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:51:17,529 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 99 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:17,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 80 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-02-16 13:51:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 270. [2022-02-16 13:51:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.758364312267658) internal successors, (742), 269 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 742 transitions. [2022-02-16 13:51:17,532 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 742 transitions. Word has length 20 [2022-02-16 13:51:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:17,532 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 742 transitions. [2022-02-16 13:51:17,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 742 transitions. [2022-02-16 13:51:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:17,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:17,532 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:17,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:17,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:17,735 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1517967776, now seen corresponding path program 218 times [2022-02-16 13:51:17,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:17,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070012672] [2022-02-16 13:51:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:17,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:17,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:17,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070012672] [2022-02-16 13:51:17,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070012672] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:17,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531255006] [2022-02-16 13:51:17,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:17,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:17,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:17,851 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:17,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-16 13:51:18,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:18,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:18,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:18,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:51:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:18,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:18,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:18,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:18,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531255006] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:18,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:18,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:51:18,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449608424] [2022-02-16 13:51:18,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:18,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:18,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:18,581 INFO L87 Difference]: Start difference. First operand 270 states and 742 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:18,998 INFO L93 Difference]: Finished difference Result 361 states and 912 transitions. [2022-02-16 13:51:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:18,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:18,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:18,999 INFO L225 Difference]: With dead ends: 361 [2022-02-16 13:51:18,999 INFO L226 Difference]: Without dead ends: 361 [2022-02-16 13:51:18,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:51:18,999 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 129 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:18,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 71 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:19,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-16 13:51:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 266. [2022-02-16 13:51:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.7471698113207546) internal successors, (728), 265 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 728 transitions. [2022-02-16 13:51:19,003 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 728 transitions. Word has length 20 [2022-02-16 13:51:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:19,003 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 728 transitions. [2022-02-16 13:51:19,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 728 transitions. [2022-02-16 13:51:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:19,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:19,003 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:19,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-02-16 13:51:19,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-02-16 13:51:19,211 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:19,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1222540594, now seen corresponding path program 219 times [2022-02-16 13:51:19,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:19,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360772653] [2022-02-16 13:51:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:19,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:19,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:19,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360772653] [2022-02-16 13:51:19,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360772653] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:19,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031615299] [2022-02-16 13:51:19,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:19,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:19,317 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:19,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-16 13:51:19,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:51:19,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:19,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:19,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:20,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:20,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:20,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031615299] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:20,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:20,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:51:20,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493209378] [2022-02-16 13:51:20,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:20,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:51:20,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:20,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:51:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:20,089 INFO L87 Difference]: Start difference. First operand 266 states and 728 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:20,426 INFO L93 Difference]: Finished difference Result 322 states and 848 transitions. [2022-02-16 13:51:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:20,426 INFO L225 Difference]: With dead ends: 322 [2022-02-16 13:51:20,426 INFO L226 Difference]: Without dead ends: 322 [2022-02-16 13:51:20,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:51:20,427 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:20,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 57 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-16 13:51:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 264. [2022-02-16 13:51:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.741444866920152) internal successors, (721), 263 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 721 transitions. [2022-02-16 13:51:20,430 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 721 transitions. Word has length 20 [2022-02-16 13:51:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:20,430 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 721 transitions. [2022-02-16 13:51:20,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 721 transitions. [2022-02-16 13:51:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:20,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:20,430 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:20,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-02-16 13:51:20,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:20,639 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1058331198, now seen corresponding path program 220 times [2022-02-16 13:51:20,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:20,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681920663] [2022-02-16 13:51:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:20,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:20,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:20,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681920663] [2022-02-16 13:51:20,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681920663] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:20,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594445037] [2022-02-16 13:51:20,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:20,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:20,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:20,746 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:20,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-16 13:51:20,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:20,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:20,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:21,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:21,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:21,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:21,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:21,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594445037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:21,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:21,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:51:21,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524101332] [2022-02-16 13:51:21,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:21,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:21,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:21,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:21,477 INFO L87 Difference]: Start difference. First operand 264 states and 721 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:21,767 INFO L93 Difference]: Finished difference Result 341 states and 874 transitions. [2022-02-16 13:51:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:21,768 INFO L225 Difference]: With dead ends: 341 [2022-02-16 13:51:21,768 INFO L226 Difference]: Without dead ends: 339 [2022-02-16 13:51:21,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:21,769 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 64 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:21,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 106 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-16 13:51:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2022-02-16 13:51:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.735074626865672) internal successors, (733), 268 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 733 transitions. [2022-02-16 13:51:21,772 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 733 transitions. Word has length 20 [2022-02-16 13:51:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:21,772 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 733 transitions. [2022-02-16 13:51:21,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 733 transitions. [2022-02-16 13:51:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:21,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:21,772 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:21,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:21,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-02-16 13:51:21,988 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2121538302, now seen corresponding path program 221 times [2022-02-16 13:51:21,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:21,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342497126] [2022-02-16 13:51:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:21,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:22,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:22,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342497126] [2022-02-16 13:51:22,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342497126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:22,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739940299] [2022-02-16 13:51:22,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:22,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:22,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:22,119 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:22,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-16 13:51:22,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:51:22,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:22,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:22,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:22,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:22,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:22,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:22,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739940299] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:22,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:22,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:51:22,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126873410] [2022-02-16 13:51:22,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:22,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:51:22,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:22,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:51:22,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:22,811 INFO L87 Difference]: Start difference. First operand 269 states and 733 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:23,077 INFO L93 Difference]: Finished difference Result 343 states and 880 transitions. [2022-02-16 13:51:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:51:23,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:23,077 INFO L225 Difference]: With dead ends: 343 [2022-02-16 13:51:23,077 INFO L226 Difference]: Without dead ends: 343 [2022-02-16 13:51:23,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:51:23,078 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:23,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 118 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-16 13:51:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 268. [2022-02-16 13:51:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.737827715355805) internal successors, (731), 267 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 731 transitions. [2022-02-16 13:51:23,081 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 731 transitions. Word has length 20 [2022-02-16 13:51:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:23,081 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 731 transitions. [2022-02-16 13:51:23,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 731 transitions. [2022-02-16 13:51:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:23,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:23,081 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:23,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:23,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-02-16 13:51:23,287 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash -638403364, now seen corresponding path program 222 times [2022-02-16 13:51:23,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:23,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626376636] [2022-02-16 13:51:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:23,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:23,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:23,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626376636] [2022-02-16 13:51:23,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626376636] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:23,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18989173] [2022-02-16 13:51:23,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:23,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:23,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:23,396 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:23,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-16 13:51:23,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:51:23,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:23,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:24,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:24,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:24,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18989173] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:24,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:24,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:51:24,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298573169] [2022-02-16 13:51:24,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:24,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:51:24,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:24,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:51:24,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:24,059 INFO L87 Difference]: Start difference. First operand 268 states and 731 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:24,260 INFO L93 Difference]: Finished difference Result 328 states and 861 transitions. [2022-02-16 13:51:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:24,261 INFO L225 Difference]: With dead ends: 328 [2022-02-16 13:51:24,261 INFO L226 Difference]: Without dead ends: 328 [2022-02-16 13:51:24,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:51:24,261 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:24,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 62 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-16 13:51:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 263. [2022-02-16 13:51:24,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.736641221374046) internal successors, (717), 262 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 717 transitions. [2022-02-16 13:51:24,264 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 717 transitions. Word has length 20 [2022-02-16 13:51:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:24,265 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 717 transitions. [2022-02-16 13:51:24,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 717 transitions. [2022-02-16 13:51:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:24,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:24,265 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:24,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:24,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-02-16 13:51:24,481 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:24,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:24,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1056716978, now seen corresponding path program 223 times [2022-02-16 13:51:24,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:24,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24952432] [2022-02-16 13:51:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:24,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:24,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:24,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24952432] [2022-02-16 13:51:24,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24952432] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:24,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845454339] [2022-02-16 13:51:24,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:24,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:24,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:24,537 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:24,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-16 13:51:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:24,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:24,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:24,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:24,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:24,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:25,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845454339] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:25,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:25,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:51:25,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478049314] [2022-02-16 13:51:25,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:25,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:25,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:25,039 INFO L87 Difference]: Start difference. First operand 263 states and 717 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:25,278 INFO L93 Difference]: Finished difference Result 315 states and 828 transitions. [2022-02-16 13:51:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:25,278 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:25,278 INFO L225 Difference]: With dead ends: 315 [2022-02-16 13:51:25,278 INFO L226 Difference]: Without dead ends: 312 [2022-02-16 13:51:25,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:51:25,279 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:25,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 68 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-16 13:51:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2022-02-16 13:51:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.731060606060606) internal successors, (721), 264 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 721 transitions. [2022-02-16 13:51:25,282 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 721 transitions. Word has length 20 [2022-02-16 13:51:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:25,282 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 721 transitions. [2022-02-16 13:51:25,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 721 transitions. [2022-02-16 13:51:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:25,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:25,282 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:25,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:25,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-02-16 13:51:25,483 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1265010286, now seen corresponding path program 224 times [2022-02-16 13:51:25,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:25,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39534510] [2022-02-16 13:51:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:25,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:25,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:25,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39534510] [2022-02-16 13:51:25,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39534510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:25,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732657731] [2022-02-16 13:51:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:25,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:25,554 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:25,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-16 13:51:25,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:25,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:25,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:25,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:51:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:25,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:25,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:25,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:26,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732657731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:26,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:26,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:51:26,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869326020] [2022-02-16 13:51:26,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:26,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:26,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:26,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:26,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:26,045 INFO L87 Difference]: Start difference. First operand 265 states and 721 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:26,201 INFO L93 Difference]: Finished difference Result 328 states and 845 transitions. [2022-02-16 13:51:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:26,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:26,202 INFO L225 Difference]: With dead ends: 328 [2022-02-16 13:51:26,202 INFO L226 Difference]: Without dead ends: 326 [2022-02-16 13:51:26,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:26,202 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:26,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 74 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-16 13:51:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2022-02-16 13:51:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.7265917602996255) internal successors, (728), 267 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 728 transitions. [2022-02-16 13:51:26,205 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 728 transitions. Word has length 20 [2022-02-16 13:51:26,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:26,205 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 728 transitions. [2022-02-16 13:51:26,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:26,205 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 728 transitions. [2022-02-16 13:51:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:26,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:26,206 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:26,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:26,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:26,422 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:26,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1914859214, now seen corresponding path program 225 times [2022-02-16 13:51:26,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:26,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227878325] [2022-02-16 13:51:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:26,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:26,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:26,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227878325] [2022-02-16 13:51:26,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227878325] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:26,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314711778] [2022-02-16 13:51:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:26,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:26,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:26,488 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:26,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-16 13:51:26,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:51:26,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:26,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:26,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:51:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:26,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:26,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:26,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:27,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314711778] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:27,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:27,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:51:27,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654964081] [2022-02-16 13:51:27,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:27,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:27,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:27,028 INFO L87 Difference]: Start difference. First operand 268 states and 728 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:27,212 INFO L93 Difference]: Finished difference Result 315 states and 831 transitions. [2022-02-16 13:51:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:27,213 INFO L225 Difference]: With dead ends: 315 [2022-02-16 13:51:27,213 INFO L226 Difference]: Without dead ends: 315 [2022-02-16 13:51:27,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:51:27,213 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:27,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-02-16 13:51:27,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 264. [2022-02-16 13:51:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7338403041825097) internal successors, (719), 263 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 719 transitions. [2022-02-16 13:51:27,216 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 719 transitions. Word has length 20 [2022-02-16 13:51:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:27,216 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 719 transitions. [2022-02-16 13:51:27,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 719 transitions. [2022-02-16 13:51:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:27,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:27,217 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:27,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:27,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:27,431 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:27,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2446892, now seen corresponding path program 226 times [2022-02-16 13:51:27,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:27,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174104845] [2022-02-16 13:51:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:27,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:27,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:27,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174104845] [2022-02-16 13:51:27,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174104845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:27,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507758381] [2022-02-16 13:51:27,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:27,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:27,481 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:27,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-16 13:51:27,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:27,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:27,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:27,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:27,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:27,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:27,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:27,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:27,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507758381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:27,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:27,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:51:27,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330602306] [2022-02-16 13:51:27,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:27,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:51:27,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:27,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:51:27,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:51:27,890 INFO L87 Difference]: Start difference. First operand 264 states and 719 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:28,094 INFO L93 Difference]: Finished difference Result 330 states and 849 transitions. [2022-02-16 13:51:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:28,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:28,094 INFO L225 Difference]: With dead ends: 330 [2022-02-16 13:51:28,094 INFO L226 Difference]: Without dead ends: 328 [2022-02-16 13:51:28,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:28,095 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:28,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 69 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-16 13:51:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 269. [2022-02-16 13:51:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.7276119402985075) internal successors, (731), 268 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 731 transitions. [2022-02-16 13:51:28,098 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 731 transitions. Word has length 20 [2022-02-16 13:51:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:28,098 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 731 transitions. [2022-02-16 13:51:28,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 731 transitions. [2022-02-16 13:51:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:28,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:28,098 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:28,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-02-16 13:51:28,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-02-16 13:51:28,315 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:28,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1112650904, now seen corresponding path program 227 times [2022-02-16 13:51:28,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:28,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819968398] [2022-02-16 13:51:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:28,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:28,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:28,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819968398] [2022-02-16 13:51:28,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819968398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:28,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547743645] [2022-02-16 13:51:28,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:28,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:28,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:28,382 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:28,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-16 13:51:28,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:51:28,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:28,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:28,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:28,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:28,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:28,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:28,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547743645] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:28,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:28,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:51:28,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945373389] [2022-02-16 13:51:28,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:28,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:28,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:28,915 INFO L87 Difference]: Start difference. First operand 269 states and 731 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:29,161 INFO L93 Difference]: Finished difference Result 330 states and 851 transitions. [2022-02-16 13:51:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:51:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:29,162 INFO L225 Difference]: With dead ends: 330 [2022-02-16 13:51:29,162 INFO L226 Difference]: Without dead ends: 330 [2022-02-16 13:51:29,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:29,163 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:29,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 65 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-16 13:51:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 268. [2022-02-16 13:51:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.730337078651685) internal successors, (729), 267 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 729 transitions. [2022-02-16 13:51:29,166 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 729 transitions. Word has length 20 [2022-02-16 13:51:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:29,166 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 729 transitions. [2022-02-16 13:51:29,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 729 transitions. [2022-02-16 13:51:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:29,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:29,166 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:29,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:29,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-02-16 13:51:29,383 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:29,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:29,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1699181454, now seen corresponding path program 228 times [2022-02-16 13:51:29,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:29,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888194815] [2022-02-16 13:51:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:29,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:29,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:29,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888194815] [2022-02-16 13:51:29,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888194815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:29,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834812837] [2022-02-16 13:51:29,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:29,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:29,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:29,442 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:29,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-16 13:51:29,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:51:29,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:29,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:29,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:29,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:29,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:29,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:29,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834812837] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:29,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:29,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:51:29,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942428056] [2022-02-16 13:51:29,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:29,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:51:29,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:51:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:51:29,877 INFO L87 Difference]: Start difference. First operand 268 states and 729 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:30,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:30,070 INFO L93 Difference]: Finished difference Result 318 states and 837 transitions. [2022-02-16 13:51:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:30,071 INFO L225 Difference]: With dead ends: 318 [2022-02-16 13:51:30,071 INFO L226 Difference]: Without dead ends: 318 [2022-02-16 13:51:30,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:30,071 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:30,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-16 13:51:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 262. [2022-02-16 13:51:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.731800766283525) internal successors, (713), 261 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 713 transitions. [2022-02-16 13:51:30,074 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 713 transitions. Word has length 20 [2022-02-16 13:51:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:30,074 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 713 transitions. [2022-02-16 13:51:30,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 713 transitions. [2022-02-16 13:51:30,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:30,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:30,075 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:30,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-02-16 13:51:30,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:30,279 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash 16212030, now seen corresponding path program 229 times [2022-02-16 13:51:30,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:30,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600979916] [2022-02-16 13:51:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:30,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:30,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:30,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600979916] [2022-02-16 13:51:30,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600979916] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:30,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393108677] [2022-02-16 13:51:30,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:30,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:30,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:30,372 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:30,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-16 13:51:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:30,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:30,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:30,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:30,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:30,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:30,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393108677] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:30,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:30,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-16 13:51:30,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056800260] [2022-02-16 13:51:30,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:30,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:30,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:30,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:30,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:30,799 INFO L87 Difference]: Start difference. First operand 262 states and 713 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:31,053 INFO L93 Difference]: Finished difference Result 346 states and 876 transitions. [2022-02-16 13:51:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:31,053 INFO L225 Difference]: With dead ends: 346 [2022-02-16 13:51:31,053 INFO L226 Difference]: Without dead ends: 342 [2022-02-16 13:51:31,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:31,054 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 62 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:31,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 82 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-02-16 13:51:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 264. [2022-02-16 13:51:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.726235741444867) internal successors, (717), 263 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 717 transitions. [2022-02-16 13:51:31,057 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 717 transitions. Word has length 20 [2022-02-16 13:51:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:31,057 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 717 transitions. [2022-02-16 13:51:31,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 717 transitions. [2022-02-16 13:51:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:31,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:31,057 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:31,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-02-16 13:51:31,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:31,274 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:31,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:31,274 INFO L85 PathProgramCache]: Analyzing trace with hash 674788930, now seen corresponding path program 230 times [2022-02-16 13:51:31,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:31,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978796799] [2022-02-16 13:51:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:31,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:31,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:31,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978796799] [2022-02-16 13:51:31,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978796799] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:31,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360927101] [2022-02-16 13:51:31,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:31,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:31,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:31,348 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:31,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-16 13:51:31,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:31,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:31,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:31,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:31,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:31,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:31,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360927101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:31,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:31,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:51:31,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682863128] [2022-02-16 13:51:31,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:31,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:51:31,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:31,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:51:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:51:31,874 INFO L87 Difference]: Start difference. First operand 264 states and 717 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:32,047 INFO L93 Difference]: Finished difference Result 346 states and 877 transitions. [2022-02-16 13:51:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:32,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:32,048 INFO L225 Difference]: With dead ends: 346 [2022-02-16 13:51:32,048 INFO L226 Difference]: Without dead ends: 343 [2022-02-16 13:51:32,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:32,048 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:32,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 58 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:32,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-16 13:51:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 265. [2022-02-16 13:51:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.7234848484848486) internal successors, (719), 264 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 719 transitions. [2022-02-16 13:51:32,051 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 719 transitions. Word has length 20 [2022-02-16 13:51:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:32,051 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 719 transitions. [2022-02-16 13:51:32,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 719 transitions. [2022-02-16 13:51:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:32,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:32,052 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:32,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-02-16 13:51:32,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:32,267 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash 883082238, now seen corresponding path program 231 times [2022-02-16 13:51:32,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:32,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403706856] [2022-02-16 13:51:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:32,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:32,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:32,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403706856] [2022-02-16 13:51:32,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403706856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:32,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102582429] [2022-02-16 13:51:32,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:32,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:32,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:32,352 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:32,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-16 13:51:32,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:51:32,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:32,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:32,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:32,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:51:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:32,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:32,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:32,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:32,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102582429] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:32,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:32,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:51:32,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908158497] [2022-02-16 13:51:32,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:32,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:51:32,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:51:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:51:32,885 INFO L87 Difference]: Start difference. First operand 265 states and 719 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:33,310 INFO L93 Difference]: Finished difference Result 359 states and 894 transitions. [2022-02-16 13:51:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:33,311 INFO L225 Difference]: With dead ends: 359 [2022-02-16 13:51:33,311 INFO L226 Difference]: Without dead ends: 357 [2022-02-16 13:51:33,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:51:33,311 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:33,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 99 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-02-16 13:51:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 268. [2022-02-16 13:51:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.7191011235955056) internal successors, (726), 267 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 726 transitions. [2022-02-16 13:51:33,314 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 726 transitions. Word has length 20 [2022-02-16 13:51:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:33,314 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 726 transitions. [2022-02-16 13:51:33,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 726 transitions. [2022-02-16 13:51:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:33,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:33,315 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:33,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-02-16 13:51:33,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-02-16 13:51:33,532 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1998180034, now seen corresponding path program 232 times [2022-02-16 13:51:33,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:33,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963043113] [2022-02-16 13:51:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:33,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:33,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:33,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963043113] [2022-02-16 13:51:33,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963043113] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:33,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081964304] [2022-02-16 13:51:33,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:33,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:33,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:33,623 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:33,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-16 13:51:33,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:33,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:33,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:33,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:33,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:51:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:34,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:34,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:34,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:34,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081964304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:34,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:34,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:51:34,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410030817] [2022-02-16 13:51:34,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:34,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:34,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:34,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:34,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:34,254 INFO L87 Difference]: Start difference. First operand 268 states and 726 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:34,565 INFO L93 Difference]: Finished difference Result 346 states and 880 transitions. [2022-02-16 13:51:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:34,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:34,566 INFO L225 Difference]: With dead ends: 346 [2022-02-16 13:51:34,566 INFO L226 Difference]: Without dead ends: 346 [2022-02-16 13:51:34,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:51:34,566 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:34,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 72 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-16 13:51:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 263. [2022-02-16 13:51:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7290076335877864) internal successors, (715), 262 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 715 transitions. [2022-02-16 13:51:34,569 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 715 transitions. Word has length 20 [2022-02-16 13:51:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:34,570 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 715 transitions. [2022-02-16 13:51:34,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 715 transitions. [2022-02-16 13:51:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:34,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:34,570 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:34,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:34,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-02-16 13:51:34,786 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:34,787 INFO L85 PathProgramCache]: Analyzing trace with hash 250477694, now seen corresponding path program 233 times [2022-02-16 13:51:34,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:34,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356527625] [2022-02-16 13:51:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:34,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:34,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:34,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356527625] [2022-02-16 13:51:34,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356527625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:34,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287178239] [2022-02-16 13:51:34,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:34,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:34,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:34,847 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:34,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-16 13:51:35,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:35,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:35,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:35,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:35,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:35,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:35,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:35,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287178239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:35,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:35,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-16 13:51:35,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509931328] [2022-02-16 13:51:35,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:35,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:35,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:35,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:35,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:35,347 INFO L87 Difference]: Start difference. First operand 263 states and 715 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:35,620 INFO L93 Difference]: Finished difference Result 313 states and 822 transitions. [2022-02-16 13:51:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:35,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:35,621 INFO L225 Difference]: With dead ends: 313 [2022-02-16 13:51:35,621 INFO L226 Difference]: Without dead ends: 310 [2022-02-16 13:51:35,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:35,621 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:35,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 80 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-16 13:51:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 265. [2022-02-16 13:51:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.7234848484848486) internal successors, (719), 264 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 719 transitions. [2022-02-16 13:51:35,624 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 719 transitions. Word has length 20 [2022-02-16 13:51:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:35,624 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 719 transitions. [2022-02-16 13:51:35,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 719 transitions. [2022-02-16 13:51:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:35,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:35,625 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:35,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-02-16 13:51:35,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:35,841 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:35,842 INFO L85 PathProgramCache]: Analyzing trace with hash 458771002, now seen corresponding path program 234 times [2022-02-16 13:51:35,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:35,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332132504] [2022-02-16 13:51:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:35,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:35,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:35,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332132504] [2022-02-16 13:51:35,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332132504] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:35,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674160335] [2022-02-16 13:51:35,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:35,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:35,892 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:35,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-16 13:51:36,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:51:36,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:36,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:36,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:36,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:51:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:36,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:36,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:36,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:36,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674160335] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:36,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:36,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:51:36,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959300118] [2022-02-16 13:51:36,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:36,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:51:36,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:36,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:51:36,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:51:36,288 INFO L87 Difference]: Start difference. First operand 265 states and 719 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:36,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:36,430 INFO L93 Difference]: Finished difference Result 326 states and 839 transitions. [2022-02-16 13:51:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:36,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:36,430 INFO L225 Difference]: With dead ends: 326 [2022-02-16 13:51:36,430 INFO L226 Difference]: Without dead ends: 324 [2022-02-16 13:51:36,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:36,431 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:36,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 69 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-16 13:51:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 268. [2022-02-16 13:51:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.7191011235955056) internal successors, (726), 267 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 726 transitions. [2022-02-16 13:51:36,434 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 726 transitions. Word has length 20 [2022-02-16 13:51:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:36,434 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 726 transitions. [2022-02-16 13:51:36,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 726 transitions. [2022-02-16 13:51:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:36,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:36,434 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:36,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-02-16 13:51:36,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-02-16 13:51:36,644 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1573868798, now seen corresponding path program 235 times [2022-02-16 13:51:36,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:36,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294909241] [2022-02-16 13:51:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:36,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:36,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:36,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294909241] [2022-02-16 13:51:36,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294909241] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:36,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129648544] [2022-02-16 13:51:36,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:36,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:36,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:36,694 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:36,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-16 13:51:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:36,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:36,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:36,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:51:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:37,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:37,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:37,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:37,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129648544] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:37,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:37,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:51:37,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091474897] [2022-02-16 13:51:37,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:37,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:51:37,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:37,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:51:37,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:51:37,203 INFO L87 Difference]: Start difference. First operand 268 states and 726 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:37,363 INFO L93 Difference]: Finished difference Result 313 states and 825 transitions. [2022-02-16 13:51:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:37,363 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:37,364 INFO L225 Difference]: With dead ends: 313 [2022-02-16 13:51:37,364 INFO L226 Difference]: Without dead ends: 313 [2022-02-16 13:51:37,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:37,364 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:37,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 63 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-16 13:51:37,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 264. [2022-02-16 13:51:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.726235741444867) internal successors, (717), 263 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 717 transitions. [2022-02-16 13:51:37,368 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 717 transitions. Word has length 20 [2022-02-16 13:51:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:37,368 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 717 transitions. [2022-02-16 13:51:37,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 717 transitions. [2022-02-16 13:51:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:37,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:37,368 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:37,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:37,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-02-16 13:51:37,583 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash -808686176, now seen corresponding path program 236 times [2022-02-16 13:51:37,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:37,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029179809] [2022-02-16 13:51:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:37,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:37,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:37,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029179809] [2022-02-16 13:51:37,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029179809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:37,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854685480] [2022-02-16 13:51:37,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:37,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:37,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:37,657 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:37,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-16 13:51:37,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:37,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:37,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:37,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:37,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:37,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:38,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:38,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:38,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854685480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:38,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:38,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-16 13:51:38,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051632458] [2022-02-16 13:51:38,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:38,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:38,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:38,129 INFO L87 Difference]: Start difference. First operand 264 states and 717 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:38,361 INFO L93 Difference]: Finished difference Result 327 states and 841 transitions. [2022-02-16 13:51:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:38,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:38,362 INFO L225 Difference]: With dead ends: 327 [2022-02-16 13:51:38,362 INFO L226 Difference]: Without dead ends: 325 [2022-02-16 13:51:38,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:38,362 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:38,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 85 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-16 13:51:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 269. [2022-02-16 13:51:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.720149253731343) internal successors, (729), 268 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 729 transitions. [2022-02-16 13:51:38,365 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 729 transitions. Word has length 20 [2022-02-16 13:51:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:38,365 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 729 transitions. [2022-02-16 13:51:38,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 729 transitions. [2022-02-16 13:51:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:38,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:38,366 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:38,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-02-16 13:51:38,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-02-16 13:51:38,569 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash 306411620, now seen corresponding path program 237 times [2022-02-16 13:51:38,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:38,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671346690] [2022-02-16 13:51:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:38,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:38,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:38,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671346690] [2022-02-16 13:51:38,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671346690] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:38,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95525472] [2022-02-16 13:51:38,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:38,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:38,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:38,638 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:38,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-16 13:51:38,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:51:38,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:38,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:38,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:38,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:38,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:38,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:39,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95525472] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:39,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:39,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:51:39,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449230476] [2022-02-16 13:51:39,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:39,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:51:39,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:39,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:51:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:51:39,034 INFO L87 Difference]: Start difference. First operand 269 states and 729 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:39,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:39,260 INFO L93 Difference]: Finished difference Result 327 states and 843 transitions. [2022-02-16 13:51:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:51:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:39,261 INFO L225 Difference]: With dead ends: 327 [2022-02-16 13:51:39,261 INFO L226 Difference]: Without dead ends: 327 [2022-02-16 13:51:39,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:39,261 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:39,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 70 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-16 13:51:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 268. [2022-02-16 13:51:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.7228464419475658) internal successors, (727), 267 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 727 transitions. [2022-02-16 13:51:39,264 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 727 transitions. Word has length 20 [2022-02-16 13:51:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:39,264 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 727 transitions. [2022-02-16 13:51:39,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 727 transitions. [2022-02-16 13:51:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:39,265 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:39,265 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:39,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:39,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-02-16 13:51:39,473 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1789546558, now seen corresponding path program 238 times [2022-02-16 13:51:39,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:39,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929395034] [2022-02-16 13:51:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:39,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:39,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:39,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929395034] [2022-02-16 13:51:39,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929395034] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:39,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406299347] [2022-02-16 13:51:39,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:39,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:39,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:39,532 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:39,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-16 13:51:39,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:39,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:39,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:39,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:39,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:39,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:39,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:39,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406299347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:39,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:39,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:51:39,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677272927] [2022-02-16 13:51:39,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:39,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:51:39,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:39,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:51:39,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:51:39,905 INFO L87 Difference]: Start difference. First operand 268 states and 727 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:40,093 INFO L93 Difference]: Finished difference Result 315 states and 829 transitions. [2022-02-16 13:51:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:40,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:40,093 INFO L225 Difference]: With dead ends: 315 [2022-02-16 13:51:40,093 INFO L226 Difference]: Without dead ends: 315 [2022-02-16 13:51:40,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:40,094 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:40,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 51 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-02-16 13:51:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 263. [2022-02-16 13:51:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7290076335877864) internal successors, (715), 262 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 715 transitions. [2022-02-16 13:51:40,097 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 715 transitions. Word has length 20 [2022-02-16 13:51:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:40,097 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 715 transitions. [2022-02-16 13:51:40,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:40,097 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 715 transitions. [2022-02-16 13:51:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:40,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:40,097 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:40,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:40,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:40,307 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1830014266, now seen corresponding path program 239 times [2022-02-16 13:51:40,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:40,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206882426] [2022-02-16 13:51:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:40,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:40,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:40,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206882426] [2022-02-16 13:51:40,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206882426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:40,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381268155] [2022-02-16 13:51:40,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:40,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:40,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:40,456 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:40,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-16 13:51:40,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:40,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:40,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:40,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:40,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:40,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:40,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:40,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:40,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381268155] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:40,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:40,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:51:40,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602660018] [2022-02-16 13:51:40,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:40,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:40,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:40,997 INFO L87 Difference]: Start difference. First operand 263 states and 715 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:41,316 INFO L93 Difference]: Finished difference Result 300 states and 782 transitions. [2022-02-16 13:51:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:41,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:41,317 INFO L225 Difference]: With dead ends: 300 [2022-02-16 13:51:41,317 INFO L226 Difference]: Without dead ends: 300 [2022-02-16 13:51:41,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:41,317 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:41,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 128 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-16 13:51:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 266. [2022-02-16 13:51:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.7169811320754715) internal successors, (720), 265 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 720 transitions. [2022-02-16 13:51:41,320 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 720 transitions. Word has length 20 [2022-02-16 13:51:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:41,320 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 720 transitions. [2022-02-16 13:51:41,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 720 transitions. [2022-02-16 13:51:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:41,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:41,321 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:41,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:41,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:41,528 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:41,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1630223882, now seen corresponding path program 240 times [2022-02-16 13:51:41,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:41,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989170097] [2022-02-16 13:51:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:41,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:41,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:41,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989170097] [2022-02-16 13:51:41,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989170097] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:41,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7346393] [2022-02-16 13:51:41,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:41,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:41,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:41,610 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:41,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-16 13:51:41,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:51:41,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:41,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:41,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:41,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:41,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:42,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:42,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:42,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7346393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:42,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:42,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:51:42,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105377086] [2022-02-16 13:51:42,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:42,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:42,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:42,098 INFO L87 Difference]: Start difference. First operand 266 states and 720 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:42,350 INFO L93 Difference]: Finished difference Result 317 states and 805 transitions. [2022-02-16 13:51:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:42,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:42,351 INFO L225 Difference]: With dead ends: 317 [2022-02-16 13:51:42,351 INFO L226 Difference]: Without dead ends: 317 [2022-02-16 13:51:42,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:42,351 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:42,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 114 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-16 13:51:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 267. [2022-02-16 13:51:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.718045112781955) internal successors, (723), 266 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 723 transitions. [2022-02-16 13:51:42,354 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 723 transitions. Word has length 20 [2022-02-16 13:51:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:42,355 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 723 transitions. [2022-02-16 13:51:42,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 723 transitions. [2022-02-16 13:51:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:42,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:42,355 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:42,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:42,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2022-02-16 13:51:42,572 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:42,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1950210558, now seen corresponding path program 241 times [2022-02-16 13:51:42,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:42,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93091489] [2022-02-16 13:51:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:42,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:42,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:42,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93091489] [2022-02-16 13:51:42,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93091489] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:42,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117765787] [2022-02-16 13:51:42,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:42,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:42,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:42,653 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:42,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-16 13:51:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:42,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:42,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:42,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:43,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:43,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:43,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117765787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:43,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:43,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:51:43,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027143860] [2022-02-16 13:51:43,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:43,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:51:43,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:43,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:51:43,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:51:43,077 INFO L87 Difference]: Start difference. First operand 267 states and 723 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:43,282 INFO L93 Difference]: Finished difference Result 302 states and 785 transitions. [2022-02-16 13:51:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:43,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:43,283 INFO L225 Difference]: With dead ends: 302 [2022-02-16 13:51:43,283 INFO L226 Difference]: Without dead ends: 301 [2022-02-16 13:51:43,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:43,283 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:43,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 89 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-16 13:51:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 265. [2022-02-16 13:51:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.7196969696969697) internal successors, (718), 264 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 718 transitions. [2022-02-16 13:51:43,286 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 718 transitions. Word has length 20 [2022-02-16 13:51:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:43,286 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 718 transitions. [2022-02-16 13:51:43,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 718 transitions. [2022-02-16 13:51:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:43,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:43,286 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:43,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:43,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:43,499 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1181608476, now seen corresponding path program 242 times [2022-02-16 13:51:43,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:43,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5284508] [2022-02-16 13:51:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:43,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:43,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:43,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5284508] [2022-02-16 13:51:43,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5284508] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:43,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401793920] [2022-02-16 13:51:43,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:43,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:43,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:43,598 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:43,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-16 13:51:43,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:43,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:43,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:43,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:51:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:43,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:44,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:44,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:44,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401793920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:44,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:44,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:51:44,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625348973] [2022-02-16 13:51:44,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:44,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:44,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:44,184 INFO L87 Difference]: Start difference. First operand 265 states and 718 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:44,522 INFO L93 Difference]: Finished difference Result 295 states and 772 transitions. [2022-02-16 13:51:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:44,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:44,522 INFO L225 Difference]: With dead ends: 295 [2022-02-16 13:51:44,522 INFO L226 Difference]: Without dead ends: 295 [2022-02-16 13:51:44,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:44,523 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 71 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:44,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 75 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-16 13:51:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 267. [2022-02-16 13:51:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7218045112781954) internal successors, (724), 266 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 724 transitions. [2022-02-16 13:51:44,526 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 724 transitions. Word has length 20 [2022-02-16 13:51:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:44,526 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 724 transitions. [2022-02-16 13:51:44,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 724 transitions. [2022-02-16 13:51:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:44,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:44,526 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:44,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:44,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:44,727 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash -467075620, now seen corresponding path program 243 times [2022-02-16 13:51:44,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:44,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478555139] [2022-02-16 13:51:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:44,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:44,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:44,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478555139] [2022-02-16 13:51:44,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478555139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:44,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42359318] [2022-02-16 13:51:44,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:44,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:44,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:44,832 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:44,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-16 13:51:45,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:51:45,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:45,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:45,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:45,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:51:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:45,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:45,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:45,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42359318] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:45,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:45,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:51:45,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987987226] [2022-02-16 13:51:45,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:45,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:45,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:45,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:45,463 INFO L87 Difference]: Start difference. First operand 267 states and 724 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:45,870 INFO L93 Difference]: Finished difference Result 296 states and 772 transitions. [2022-02-16 13:51:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:51:45,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:45,871 INFO L225 Difference]: With dead ends: 296 [2022-02-16 13:51:45,871 INFO L226 Difference]: Without dead ends: 295 [2022-02-16 13:51:45,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:51:45,871 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:45,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 105 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-16 13:51:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 266. [2022-02-16 13:51:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.720754716981132) internal successors, (721), 265 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 721 transitions. [2022-02-16 13:51:45,874 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 721 transitions. Word has length 20 [2022-02-16 13:51:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:45,874 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 721 transitions. [2022-02-16 13:51:45,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 721 transitions. [2022-02-16 13:51:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:45,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:45,874 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:45,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:46,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:46,083 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash 120669702, now seen corresponding path program 244 times [2022-02-16 13:51:46,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:46,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543906699] [2022-02-16 13:51:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:46,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:46,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:46,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543906699] [2022-02-16 13:51:46,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543906699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:46,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828989212] [2022-02-16 13:51:46,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:46,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:46,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:46,180 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:46,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-16 13:51:46,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:46,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:46,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:46,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:46,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:46,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:46,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:46,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828989212] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:46,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:46,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:51:46,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732655793] [2022-02-16 13:51:46,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:46,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:46,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:46,762 INFO L87 Difference]: Start difference. First operand 266 states and 721 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:47,184 INFO L93 Difference]: Finished difference Result 282 states and 754 transitions. [2022-02-16 13:51:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:47,185 INFO L225 Difference]: With dead ends: 282 [2022-02-16 13:51:47,185 INFO L226 Difference]: Without dead ends: 280 [2022-02-16 13:51:47,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:47,185 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:47,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 89 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-02-16 13:51:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 263. [2022-02-16 13:51:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7290076335877864) internal successors, (715), 262 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 715 transitions. [2022-02-16 13:51:47,188 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 715 transitions. Word has length 20 [2022-02-16 13:51:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:47,188 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 715 transitions. [2022-02-16 13:51:47,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 715 transitions. [2022-02-16 13:51:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:47,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:47,189 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:47,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:47,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-02-16 13:51:47,399 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:47,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2006932315, now seen corresponding path program 245 times [2022-02-16 13:51:47,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:47,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702009748] [2022-02-16 13:51:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:47,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:47,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:47,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702009748] [2022-02-16 13:51:47,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702009748] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:47,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630491035] [2022-02-16 13:51:47,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:47,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:47,464 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:47,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-16 13:51:47,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:47,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:47,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:47,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:47,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:51:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:47,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:47,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:47,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:47,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630491035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:47,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:47,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-02-16 13:51:47,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543004454] [2022-02-16 13:51:47,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:47,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:47,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:47,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:47,964 INFO L87 Difference]: Start difference. First operand 263 states and 715 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:48,236 INFO L93 Difference]: Finished difference Result 317 states and 829 transitions. [2022-02-16 13:51:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:48,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:48,237 INFO L225 Difference]: With dead ends: 317 [2022-02-16 13:51:48,237 INFO L226 Difference]: Without dead ends: 290 [2022-02-16 13:51:48,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:48,238 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:48,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 149 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-16 13:51:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 263. [2022-02-16 13:51:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7290076335877864) internal successors, (715), 262 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 715 transitions. [2022-02-16 13:51:48,240 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 715 transitions. Word has length 20 [2022-02-16 13:51:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:48,240 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 715 transitions. [2022-02-16 13:51:48,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 715 transitions. [2022-02-16 13:51:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:48,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:48,241 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:48,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:48,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-02-16 13:51:48,451 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:48,451 INFO L85 PathProgramCache]: Analyzing trace with hash 771359106, now seen corresponding path program 246 times [2022-02-16 13:51:48,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:48,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167949712] [2022-02-16 13:51:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:48,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:48,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:48,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167949712] [2022-02-16 13:51:48,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167949712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:48,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007406357] [2022-02-16 13:51:48,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:48,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:48,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:48,572 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:48,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-16 13:51:48,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:51:48,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:48,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:48,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:48,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:51:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:48,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:49,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:49,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:49,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007406357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:49,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:49,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:51:49,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502652790] [2022-02-16 13:51:49,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:49,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:49,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:49,106 INFO L87 Difference]: Start difference. First operand 263 states and 715 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:49,434 INFO L93 Difference]: Finished difference Result 364 states and 902 transitions. [2022-02-16 13:51:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:49,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:49,434 INFO L225 Difference]: With dead ends: 364 [2022-02-16 13:51:49,434 INFO L226 Difference]: Without dead ends: 364 [2022-02-16 13:51:49,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:51:49,435 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 170 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:49,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 124 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-16 13:51:49,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 268. [2022-02-16 13:51:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.7228464419475658) internal successors, (727), 267 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 727 transitions. [2022-02-16 13:51:49,438 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 727 transitions. Word has length 20 [2022-02-16 13:51:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:49,438 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 727 transitions. [2022-02-16 13:51:49,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 727 transitions. [2022-02-16 13:51:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:49,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:49,439 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:49,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:49,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:49,639 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:49,639 INFO L85 PathProgramCache]: Analyzing trace with hash -63370042, now seen corresponding path program 247 times [2022-02-16 13:51:49,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:49,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110563375] [2022-02-16 13:51:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:49,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:49,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:49,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110563375] [2022-02-16 13:51:49,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110563375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:49,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215434324] [2022-02-16 13:51:49,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:49,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:49,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:49,790 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:49,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-16 13:51:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:50,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:51:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:50,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:50,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:50,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:50,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215434324] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:50,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:50,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:51:50,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5117679] [2022-02-16 13:51:50,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:50,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:50,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:50,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:50,296 INFO L87 Difference]: Start difference. First operand 268 states and 727 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:50,605 INFO L93 Difference]: Finished difference Result 381 states and 925 transitions. [2022-02-16 13:51:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:50,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:50,606 INFO L225 Difference]: With dead ends: 381 [2022-02-16 13:51:50,606 INFO L226 Difference]: Without dead ends: 381 [2022-02-16 13:51:50,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:50,607 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:50,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 156 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-02-16 13:51:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 270. [2022-02-16 13:51:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.7286245353159853) internal successors, (734), 269 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 734 transitions. [2022-02-16 13:51:50,610 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 734 transitions. Word has length 20 [2022-02-16 13:51:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:50,610 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 734 transitions. [2022-02-16 13:51:50,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 734 transitions. [2022-02-16 13:51:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:50,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:50,611 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:50,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:50,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:50,811 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash 651162814, now seen corresponding path program 248 times [2022-02-16 13:51:50,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:50,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719750176] [2022-02-16 13:51:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:50,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:50,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:50,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719750176] [2022-02-16 13:51:50,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719750176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:50,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812929875] [2022-02-16 13:51:50,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:50,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:50,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:50,907 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:50,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-16 13:51:51,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:51,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:51,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:51:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:51,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:51,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:51,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:51,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812929875] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:51,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:51,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:51:51,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674802501] [2022-02-16 13:51:51,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:51,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:51:51,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:51:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:51:51,462 INFO L87 Difference]: Start difference. First operand 270 states and 734 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:51,684 INFO L93 Difference]: Finished difference Result 366 states and 904 transitions. [2022-02-16 13:51:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:51,684 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:51,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:51,685 INFO L225 Difference]: With dead ends: 366 [2022-02-16 13:51:51,685 INFO L226 Difference]: Without dead ends: 365 [2022-02-16 13:51:51,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:51:51,685 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:51,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 133 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-16 13:51:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 264. [2022-02-16 13:51:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7376425855513307) internal successors, (720), 263 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 720 transitions. [2022-02-16 13:51:51,688 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 720 transitions. Word has length 20 [2022-02-16 13:51:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:51,688 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 720 transitions. [2022-02-16 13:51:51,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 720 transitions. [2022-02-16 13:51:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:51,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:51,689 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:51,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:51,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-02-16 13:51:51,906 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash -481273917, now seen corresponding path program 249 times [2022-02-16 13:51:51,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:51,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508329689] [2022-02-16 13:51:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:51,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:51,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:51,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508329689] [2022-02-16 13:51:51,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508329689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:51,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754869684] [2022-02-16 13:51:51,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:51,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:51,963 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:51,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-16 13:51:52,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:51:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:52,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:52,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:52,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:52,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:52,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754869684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:52,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:52,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-02-16 13:51:52,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094883408] [2022-02-16 13:51:52,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:52,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:51:52,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:52,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:51:52,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:51:52,418 INFO L87 Difference]: Start difference. First operand 264 states and 720 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:52,662 INFO L93 Difference]: Finished difference Result 375 states and 959 transitions. [2022-02-16 13:51:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:52,662 INFO L225 Difference]: With dead ends: 375 [2022-02-16 13:51:52,662 INFO L226 Difference]: Without dead ends: 348 [2022-02-16 13:51:52,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:51:52,663 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 97 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:52,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 157 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-16 13:51:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 267. [2022-02-16 13:51:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7669172932330826) internal successors, (736), 266 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 736 transitions. [2022-02-16 13:51:52,666 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 736 transitions. Word has length 20 [2022-02-16 13:51:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:52,666 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 736 transitions. [2022-02-16 13:51:52,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 736 transitions. [2022-02-16 13:51:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:52,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:52,666 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:52,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-02-16 13:51:52,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:52,883 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:52,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:52,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1361482938, now seen corresponding path program 250 times [2022-02-16 13:51:52,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:52,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426008994] [2022-02-16 13:51:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:52,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:52,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:52,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426008994] [2022-02-16 13:51:52,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426008994] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:52,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120004208] [2022-02-16 13:51:52,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:52,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:52,984 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:52,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-16 13:51:53,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:53,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:53,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:53,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:53,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:51:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:53,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:53,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:53,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:53,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120004208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:53,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:53,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:51:53,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328095612] [2022-02-16 13:51:53,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:53,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:53,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:53,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:53,492 INFO L87 Difference]: Start difference. First operand 267 states and 736 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:53,758 INFO L93 Difference]: Finished difference Result 352 states and 885 transitions. [2022-02-16 13:51:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:53,758 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:53,759 INFO L225 Difference]: With dead ends: 352 [2022-02-16 13:51:53,759 INFO L226 Difference]: Without dead ends: 352 [2022-02-16 13:51:53,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:53,759 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:53,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 135 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-16 13:51:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 267. [2022-02-16 13:51:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.7669172932330826) internal successors, (736), 266 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 736 transitions. [2022-02-16 13:51:53,762 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 736 transitions. Word has length 20 [2022-02-16 13:51:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:53,762 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 736 transitions. [2022-02-16 13:51:53,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 736 transitions. [2022-02-16 13:51:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:53,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:53,763 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:53,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:53,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:53,963 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:53,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1871259390, now seen corresponding path program 251 times [2022-02-16 13:51:53,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:53,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144047926] [2022-02-16 13:51:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:53,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:54,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:54,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144047926] [2022-02-16 13:51:54,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144047926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:54,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286275723] [2022-02-16 13:51:54,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:51:54,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:54,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:54,119 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:54,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-16 13:51:54,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:51:54,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:54,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:51:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:54,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:54,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:54,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:54,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286275723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:54,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:54,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:51:54,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136119108] [2022-02-16 13:51:54,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:54,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:54,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:54,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:54,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:54,735 INFO L87 Difference]: Start difference. First operand 267 states and 736 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:55,087 INFO L93 Difference]: Finished difference Result 369 states and 914 transitions. [2022-02-16 13:51:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:51:55,088 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:55,088 INFO L225 Difference]: With dead ends: 369 [2022-02-16 13:51:55,088 INFO L226 Difference]: Without dead ends: 369 [2022-02-16 13:51:55,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:51:55,089 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 248 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:55,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 146 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-02-16 13:51:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 269. [2022-02-16 13:51:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.779850746268657) internal successors, (745), 268 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 745 transitions. [2022-02-16 13:51:55,092 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 745 transitions. Word has length 20 [2022-02-16 13:51:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:55,092 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 745 transitions. [2022-02-16 13:51:55,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 745 transitions. [2022-02-16 13:51:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:55,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:55,092 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:55,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-02-16 13:51:55,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:55,293 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2066692218, now seen corresponding path program 252 times [2022-02-16 13:51:55,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:55,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066864027] [2022-02-16 13:51:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:55,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:55,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:55,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066864027] [2022-02-16 13:51:55,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066864027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:55,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096886862] [2022-02-16 13:51:55,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:51:55,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:55,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:55,413 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:55,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-16 13:51:55,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:51:55,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:55,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:55,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:55,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:51:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:55,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:55,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:55,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:55,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096886862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:55,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:55,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:51:55,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693052637] [2022-02-16 13:51:55,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:55,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:55,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:55,964 INFO L87 Difference]: Start difference. First operand 269 states and 745 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:56,237 INFO L93 Difference]: Finished difference Result 341 states and 877 transitions. [2022-02-16 13:51:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:56,238 INFO L225 Difference]: With dead ends: 341 [2022-02-16 13:51:56,238 INFO L226 Difference]: Without dead ends: 341 [2022-02-16 13:51:56,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:56,238 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:56,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 197 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-02-16 13:51:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 266. [2022-02-16 13:51:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.758490566037736) internal successors, (731), 265 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 731 transitions. [2022-02-16 13:51:56,241 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 731 transitions. Word has length 20 [2022-02-16 13:51:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:56,241 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 731 transitions. [2022-02-16 13:51:56,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 731 transitions. [2022-02-16 13:51:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:56,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:56,242 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:56,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:56,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:56,459 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1637327289, now seen corresponding path program 253 times [2022-02-16 13:51:56,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:56,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037107374] [2022-02-16 13:51:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:56,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:56,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:56,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037107374] [2022-02-16 13:51:56,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037107374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:56,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667798928] [2022-02-16 13:51:56,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:51:56,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:56,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:56,510 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:56,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-16 13:51:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:56,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:56,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:56,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:51:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:56,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:56,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:56,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:51:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:56,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667798928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:56,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:56,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-02-16 13:51:56,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310685840] [2022-02-16 13:51:56,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:56,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:51:56,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:51:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:51:56,957 INFO L87 Difference]: Start difference. First operand 266 states and 731 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:57,133 INFO L93 Difference]: Finished difference Result 328 states and 854 transitions. [2022-02-16 13:51:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:57,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:57,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:57,134 INFO L225 Difference]: With dead ends: 328 [2022-02-16 13:51:57,134 INFO L226 Difference]: Without dead ends: 292 [2022-02-16 13:51:57,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:57,134 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:57,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 115 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:51:57,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-16 13:51:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 260. [2022-02-16 13:51:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7065637065637067) internal successors, (701), 259 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 701 transitions. [2022-02-16 13:51:57,137 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 701 transitions. Word has length 20 [2022-02-16 13:51:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:57,137 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 701 transitions. [2022-02-16 13:51:57,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 701 transitions. [2022-02-16 13:51:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:57,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:57,137 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:57,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:57,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-02-16 13:51:57,354 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:57,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1980534326, now seen corresponding path program 254 times [2022-02-16 13:51:57,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:57,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567862593] [2022-02-16 13:51:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:57,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:57,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:57,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567862593] [2022-02-16 13:51:57,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567862593] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:57,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529314658] [2022-02-16 13:51:57,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:51:57,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:57,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:57,439 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:57,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-16 13:51:57,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:51:57,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:57,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:51:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:57,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:57,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:57,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:57,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529314658] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:57,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:57,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:51:57,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166635315] [2022-02-16 13:51:57,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:57,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:51:57,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:51:57,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:51:57,900 INFO L87 Difference]: Start difference. First operand 260 states and 701 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:58,115 INFO L93 Difference]: Finished difference Result 380 states and 936 transitions. [2022-02-16 13:51:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:58,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:58,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:58,123 INFO L225 Difference]: With dead ends: 380 [2022-02-16 13:51:58,123 INFO L226 Difference]: Without dead ends: 380 [2022-02-16 13:51:58,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:51:58,125 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 134 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:58,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 150 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-16 13:51:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 266. [2022-02-16 13:51:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.720754716981132) internal successors, (721), 265 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 721 transitions. [2022-02-16 13:51:58,135 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 721 transitions. Word has length 20 [2022-02-16 13:51:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:58,135 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 721 transitions. [2022-02-16 13:51:58,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 721 transitions. [2022-02-16 13:51:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:58,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:58,136 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:58,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-02-16 13:51:58,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-02-16 13:51:58,341 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1266001470, now seen corresponding path program 255 times [2022-02-16 13:51:58,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:58,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545508278] [2022-02-16 13:51:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:58,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:58,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:58,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545508278] [2022-02-16 13:51:58,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545508278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:58,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337903158] [2022-02-16 13:51:58,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:51:58,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:58,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:58,440 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:58,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-16 13:51:58,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:51:58,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:58,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:58,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:58,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:51:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:58,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:51:58,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:51:58,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:51:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:59,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337903158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:51:59,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:51:59,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:51:59,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858065206] [2022-02-16 13:51:59,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:51:59,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:51:59,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:51:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:51:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:51:59,018 INFO L87 Difference]: Start difference. First operand 266 states and 721 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:51:59,283 INFO L93 Difference]: Finished difference Result 375 states and 925 transitions. [2022-02-16 13:51:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:51:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:51:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:51:59,283 INFO L225 Difference]: With dead ends: 375 [2022-02-16 13:51:59,284 INFO L226 Difference]: Without dead ends: 374 [2022-02-16 13:51:59,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:51:59,284 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 169 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:51:59,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 129 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:51:59,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-16 13:51:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 263. [2022-02-16 13:51:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7213740458015265) internal successors, (713), 262 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 713 transitions. [2022-02-16 13:51:59,287 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 713 transitions. Word has length 20 [2022-02-16 13:51:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:51:59,287 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 713 transitions. [2022-02-16 13:51:59,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:51:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 713 transitions. [2022-02-16 13:51:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:51:59,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:51:59,288 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:51:59,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-02-16 13:51:59,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-02-16 13:51:59,505 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:51:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:51:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1772241018, now seen corresponding path program 256 times [2022-02-16 13:51:59,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:51:59,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74711126] [2022-02-16 13:51:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:51:59,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:51:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:51:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:51:59,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:51:59,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74711126] [2022-02-16 13:51:59,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74711126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:51:59,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015551128] [2022-02-16 13:51:59,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:51:59,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:51:59,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:51:59,598 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:51:59,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-16 13:51:59,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:51:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:51:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:51:59,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:51:59,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:52:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:00,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:00,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:00,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:00,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015551128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:00,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:00,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:00,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687326768] [2022-02-16 13:52:00,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:00,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:00,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:00,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:00,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:00,243 INFO L87 Difference]: Start difference. First operand 263 states and 713 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:00,651 INFO L93 Difference]: Finished difference Result 399 states and 965 transitions. [2022-02-16 13:52:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:00,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:00,652 INFO L225 Difference]: With dead ends: 399 [2022-02-16 13:52:00,652 INFO L226 Difference]: Without dead ends: 399 [2022-02-16 13:52:00,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:52:00,652 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:00,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 166 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:00,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-16 13:52:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 263. [2022-02-16 13:52:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7290076335877864) internal successors, (715), 262 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 715 transitions. [2022-02-16 13:52:00,655 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 715 transitions. Word has length 20 [2022-02-16 13:52:00,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:00,655 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 715 transitions. [2022-02-16 13:52:00,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 715 transitions. [2022-02-16 13:52:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:00,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:00,656 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:00,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:00,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:00,872 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:00,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1082519094, now seen corresponding path program 257 times [2022-02-16 13:52:00,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:00,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510371347] [2022-02-16 13:52:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:00,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:01,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:01,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510371347] [2022-02-16 13:52:01,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510371347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:01,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572164754] [2022-02-16 13:52:01,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:01,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:01,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:01,024 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:01,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-16 13:52:01,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:52:01,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:01,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:01,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:52:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:01,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:01,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:01,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:01,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572164754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:01,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:01,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:01,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014164958] [2022-02-16 13:52:01,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:01,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:01,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:01,648 INFO L87 Difference]: Start difference. First operand 263 states and 715 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:01,854 INFO L93 Difference]: Finished difference Result 370 states and 929 transitions. [2022-02-16 13:52:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:01,854 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:01,855 INFO L225 Difference]: With dead ends: 370 [2022-02-16 13:52:01,855 INFO L226 Difference]: Without dead ends: 370 [2022-02-16 13:52:01,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:52:01,855 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:01,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 157 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-16 13:52:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 261. [2022-02-16 13:52:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7153846153846155) internal successors, (706), 260 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 706 transitions. [2022-02-16 13:52:01,858 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 706 transitions. Word has length 20 [2022-02-16 13:52:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:01,859 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 706 transitions. [2022-02-16 13:52:01,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 706 transitions. [2022-02-16 13:52:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:01,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:01,859 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:01,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:02,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:02,073 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash 570272958, now seen corresponding path program 258 times [2022-02-16 13:52:02,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:02,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302168702] [2022-02-16 13:52:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:02,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:02,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:02,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302168702] [2022-02-16 13:52:02,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302168702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:02,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594358200] [2022-02-16 13:52:02,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:02,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:02,152 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:02,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-16 13:52:02,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:52:02,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:02,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:52:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:02,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:02,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:02,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:02,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594358200] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:02,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:02,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:02,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686972785] [2022-02-16 13:52:02,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:02,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:02,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:02,633 INFO L87 Difference]: Start difference. First operand 261 states and 706 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:02,883 INFO L93 Difference]: Finished difference Result 353 states and 888 transitions. [2022-02-16 13:52:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:02,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:02,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:02,884 INFO L225 Difference]: With dead ends: 353 [2022-02-16 13:52:02,884 INFO L226 Difference]: Without dead ends: 351 [2022-02-16 13:52:02,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:52:02,884 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:02,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 139 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-16 13:52:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 264. [2022-02-16 13:52:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.711026615969582) internal successors, (713), 263 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 713 transitions. [2022-02-16 13:52:02,889 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 713 transitions. Word has length 20 [2022-02-16 13:52:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:02,890 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 713 transitions. [2022-02-16 13:52:02,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 713 transitions. [2022-02-16 13:52:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:02,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:02,890 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:02,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:03,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-02-16 13:52:03,103 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1685370754, now seen corresponding path program 259 times [2022-02-16 13:52:03,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:03,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244659181] [2022-02-16 13:52:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:03,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:03,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:03,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244659181] [2022-02-16 13:52:03,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244659181] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:03,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301455972] [2022-02-16 13:52:03,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:03,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:03,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:03,186 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:03,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-16 13:52:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:03,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:03,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:03,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:52:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:03,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:03,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:03,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:03,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301455972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:03,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:03,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:03,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635317906] [2022-02-16 13:52:03,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:03,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:03,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:03,684 INFO L87 Difference]: Start difference. First operand 264 states and 713 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:03,922 INFO L93 Difference]: Finished difference Result 340 states and 874 transitions. [2022-02-16 13:52:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:03,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:03,923 INFO L225 Difference]: With dead ends: 340 [2022-02-16 13:52:03,923 INFO L226 Difference]: Without dead ends: 340 [2022-02-16 13:52:03,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:52:03,923 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:03,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 111 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-16 13:52:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 259. [2022-02-16 13:52:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.701550387596899) internal successors, (697), 258 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 697 transitions. [2022-02-16 13:52:03,926 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 697 transitions. Word has length 20 [2022-02-16 13:52:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:03,926 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 697 transitions. [2022-02-16 13:52:03,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:03,926 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 697 transitions. [2022-02-16 13:52:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:03,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:03,927 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:03,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:04,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:04,127 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash -484159136, now seen corresponding path program 260 times [2022-02-16 13:52:04,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:04,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834503402] [2022-02-16 13:52:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:04,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:04,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:04,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834503402] [2022-02-16 13:52:04,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834503402] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:04,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334877329] [2022-02-16 13:52:04,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:52:04,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:04,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:04,258 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:04,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-16 13:52:04,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:04,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:04,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:52:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:04,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:04,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:04,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:04,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334877329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:04,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:04,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:04,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145153018] [2022-02-16 13:52:04,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:04,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:04,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:04,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:04,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:04,927 INFO L87 Difference]: Start difference. First operand 259 states and 697 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:05,255 INFO L93 Difference]: Finished difference Result 289 states and 753 transitions. [2022-02-16 13:52:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:05,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:05,256 INFO L225 Difference]: With dead ends: 289 [2022-02-16 13:52:05,256 INFO L226 Difference]: Without dead ends: 289 [2022-02-16 13:52:05,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:05,256 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:05,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 119 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-16 13:52:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 263. [2022-02-16 13:52:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7061068702290076) internal successors, (709), 262 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 709 transitions. [2022-02-16 13:52:05,259 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 709 transitions. Word has length 20 [2022-02-16 13:52:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:05,259 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 709 transitions. [2022-02-16 13:52:05,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 709 transitions. [2022-02-16 13:52:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:05,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:05,260 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:05,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:05,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:05,464 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash 230373720, now seen corresponding path program 261 times [2022-02-16 13:52:05,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:05,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521961956] [2022-02-16 13:52:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:05,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:05,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:05,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521961956] [2022-02-16 13:52:05,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521961956] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:05,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094833744] [2022-02-16 13:52:05,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:52:05,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:05,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:05,569 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:05,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-16 13:52:05,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:52:05,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:06,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:52:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:06,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:06,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:06,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:06,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094833744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:06,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:06,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:06,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699712690] [2022-02-16 13:52:06,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:06,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:06,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:06,251 INFO L87 Difference]: Start difference. First operand 263 states and 709 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:06,728 INFO L93 Difference]: Finished difference Result 290 states and 753 transitions. [2022-02-16 13:52:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:52:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:06,729 INFO L225 Difference]: With dead ends: 290 [2022-02-16 13:52:06,729 INFO L226 Difference]: Without dead ends: 289 [2022-02-16 13:52:06,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:52:06,729 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:06,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 86 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-16 13:52:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 262. [2022-02-16 13:52:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7049808429118776) internal successors, (706), 261 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 706 transitions. [2022-02-16 13:52:06,732 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 706 transitions. Word has length 20 [2022-02-16 13:52:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:06,732 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 706 transitions. [2022-02-16 13:52:06,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 706 transitions. [2022-02-16 13:52:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:06,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:06,732 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:06,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-02-16 13:52:06,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:06,943 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:06,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:06,943 INFO L85 PathProgramCache]: Analyzing trace with hash 818119042, now seen corresponding path program 262 times [2022-02-16 13:52:06,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:06,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561169368] [2022-02-16 13:52:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:06,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:07,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:07,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561169368] [2022-02-16 13:52:07,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561169368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:07,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982928716] [2022-02-16 13:52:07,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:52:07,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:07,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:07,046 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:07,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-16 13:52:07,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:52:07,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:07,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:07,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:07,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:07,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:07,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:07,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:07,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982928716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:07,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:07,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:07,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002704745] [2022-02-16 13:52:07,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:07,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:07,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:07,683 INFO L87 Difference]: Start difference. First operand 262 states and 706 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:08,067 INFO L93 Difference]: Finished difference Result 277 states and 736 transitions. [2022-02-16 13:52:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:08,068 INFO L225 Difference]: With dead ends: 277 [2022-02-16 13:52:08,068 INFO L226 Difference]: Without dead ends: 275 [2022-02-16 13:52:08,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:08,068 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:08,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 82 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:08,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-16 13:52:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 260. [2022-02-16 13:52:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7104247104247103) internal successors, (702), 259 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 702 transitions. [2022-02-16 13:52:08,071 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 702 transitions. Word has length 20 [2022-02-16 13:52:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:08,071 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 702 transitions. [2022-02-16 13:52:08,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 702 transitions. [2022-02-16 13:52:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:08,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:08,071 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:08,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-02-16 13:52:08,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:08,287 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1677966116, now seen corresponding path program 263 times [2022-02-16 13:52:08,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:08,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597073138] [2022-02-16 13:52:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:08,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:08,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:08,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597073138] [2022-02-16 13:52:08,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597073138] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:08,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761350528] [2022-02-16 13:52:08,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:08,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:08,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:08,416 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:08,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-16 13:52:08,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:08,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:08,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:08,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:52:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:08,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:08,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:08,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:09,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761350528] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:09,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:09,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:09,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289283703] [2022-02-16 13:52:09,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:09,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:09,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:09,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:09,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:09,030 INFO L87 Difference]: Start difference. First operand 260 states and 702 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:09,414 INFO L93 Difference]: Finished difference Result 329 states and 817 transitions. [2022-02-16 13:52:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:09,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:09,415 INFO L225 Difference]: With dead ends: 329 [2022-02-16 13:52:09,415 INFO L226 Difference]: Without dead ends: 329 [2022-02-16 13:52:09,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:52:09,415 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:09,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 134 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-16 13:52:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 266. [2022-02-16 13:52:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.7245283018867923) internal successors, (722), 265 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 722 transitions. [2022-02-16 13:52:09,418 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 722 transitions. Word has length 20 [2022-02-16 13:52:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:09,418 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 722 transitions. [2022-02-16 13:52:09,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 722 transitions. [2022-02-16 13:52:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:09,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:09,419 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:09,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-02-16 13:52:09,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:09,635 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1902468324, now seen corresponding path program 264 times [2022-02-16 13:52:09,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:09,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046421123] [2022-02-16 13:52:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:09,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:09,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:09,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046421123] [2022-02-16 13:52:09,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046421123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:09,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306313193] [2022-02-16 13:52:09,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:09,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:09,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:09,774 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:09,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-16 13:52:09,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:52:09,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:09,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:10,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:52:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:10,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:10,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:10,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:10,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306313193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:10,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:10,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:10,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928120584] [2022-02-16 13:52:10,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:10,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:10,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:10,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:10,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:10,452 INFO L87 Difference]: Start difference. First operand 266 states and 722 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:10,907 INFO L93 Difference]: Finished difference Result 330 states and 816 transitions. [2022-02-16 13:52:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:52:10,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:10,908 INFO L225 Difference]: With dead ends: 330 [2022-02-16 13:52:10,908 INFO L226 Difference]: Without dead ends: 329 [2022-02-16 13:52:10,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:52:10,909 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 121 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:10,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 144 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-16 13:52:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 263. [2022-02-16 13:52:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.7251908396946565) internal successors, (714), 262 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 714 transitions. [2022-02-16 13:52:10,913 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 714 transitions. Word has length 20 [2022-02-16 13:52:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:10,913 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 714 transitions. [2022-02-16 13:52:10,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 714 transitions. [2022-02-16 13:52:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:10,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:10,913 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:10,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:11,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-02-16 13:52:11,126 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:11,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1886259424, now seen corresponding path program 265 times [2022-02-16 13:52:11,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:11,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22344614] [2022-02-16 13:52:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:11,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:11,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:11,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22344614] [2022-02-16 13:52:11,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22344614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:11,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256026913] [2022-02-16 13:52:11,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:11,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:11,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:11,234 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:11,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-16 13:52:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:11,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:52:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:11,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:11,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:11,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256026913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:11,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:11,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:11,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705087809] [2022-02-16 13:52:11,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:11,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:11,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:11,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:11,816 INFO L87 Difference]: Start difference. First operand 263 states and 714 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:12,130 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2022-02-16 13:52:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:12,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:12,131 INFO L225 Difference]: With dead ends: 331 [2022-02-16 13:52:12,131 INFO L226 Difference]: Without dead ends: 331 [2022-02-16 13:52:12,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:52:12,131 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 170 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:12,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 148 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-16 13:52:12,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 263. [2022-02-16 13:52:12,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.732824427480916) internal successors, (716), 262 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 716 transitions. [2022-02-16 13:52:12,134 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 716 transitions. Word has length 20 [2022-02-16 13:52:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:12,134 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 716 transitions. [2022-02-16 13:52:12,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 716 transitions. [2022-02-16 13:52:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:12,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:12,135 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:12,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:12,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-02-16 13:52:12,351 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1718985948, now seen corresponding path program 266 times [2022-02-16 13:52:12,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:12,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344187427] [2022-02-16 13:52:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:12,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:12,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:12,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344187427] [2022-02-16 13:52:12,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344187427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:12,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268948839] [2022-02-16 13:52:12,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:52:12,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:12,452 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:12,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-16 13:52:12,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:12,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:12,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:12,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:52:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:13,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:13,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:13,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:13,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268948839] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:13,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:13,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:13,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067038502] [2022-02-16 13:52:13,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:13,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:13,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:13,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:13,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:13,274 INFO L87 Difference]: Start difference. First operand 263 states and 716 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:13,634 INFO L93 Difference]: Finished difference Result 304 states and 785 transitions. [2022-02-16 13:52:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:13,635 INFO L225 Difference]: With dead ends: 304 [2022-02-16 13:52:13,635 INFO L226 Difference]: Without dead ends: 304 [2022-02-16 13:52:13,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:13,635 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:13,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 132 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-16 13:52:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 261. [2022-02-16 13:52:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.7192307692307693) internal successors, (707), 260 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 707 transitions. [2022-02-16 13:52:13,638 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 707 transitions. Word has length 20 [2022-02-16 13:52:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:13,638 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 707 transitions. [2022-02-16 13:52:13,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 707 transitions. [2022-02-16 13:52:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:13,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:13,639 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:13,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-02-16 13:52:13,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-02-16 13:52:13,846 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash -66193896, now seen corresponding path program 267 times [2022-02-16 13:52:13,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:13,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979661098] [2022-02-16 13:52:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:13,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:13,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:13,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979661098] [2022-02-16 13:52:13,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979661098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:13,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074593693] [2022-02-16 13:52:13,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:52:13,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:13,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:13,986 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:13,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-16 13:52:14,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:52:14,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:14,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:14,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:14,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:52:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:14,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:14,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:14,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:14,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074593693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:14,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:14,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:14,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457812424] [2022-02-16 13:52:14,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:14,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:14,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:14,638 INFO L87 Difference]: Start difference. First operand 261 states and 707 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:15,191 INFO L93 Difference]: Finished difference Result 322 states and 809 transitions. [2022-02-16 13:52:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:52:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:15,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:15,192 INFO L225 Difference]: With dead ends: 322 [2022-02-16 13:52:15,192 INFO L226 Difference]: Without dead ends: 320 [2022-02-16 13:52:15,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:52:15,192 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:15,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 145 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-16 13:52:15,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2022-02-16 13:52:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.714828897338403) internal successors, (714), 263 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 714 transitions. [2022-02-16 13:52:15,195 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 714 transitions. Word has length 20 [2022-02-16 13:52:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:15,195 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 714 transitions. [2022-02-16 13:52:15,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 714 transitions. [2022-02-16 13:52:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:15,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:15,196 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:15,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:15,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-02-16 13:52:15,396 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:15,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1048903900, now seen corresponding path program 268 times [2022-02-16 13:52:15,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:15,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322322114] [2022-02-16 13:52:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:15,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:15,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:15,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322322114] [2022-02-16 13:52:15,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322322114] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:15,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746098786] [2022-02-16 13:52:15,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:52:15,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:15,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:15,517 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:15,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-16 13:52:15,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:52:15,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:15,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:15,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:52:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:15,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:16,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:16,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:16,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746098786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:16,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:16,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:16,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30703827] [2022-02-16 13:52:16,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:16,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:16,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:16,118 INFO L87 Difference]: Start difference. First operand 264 states and 714 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:16,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:16,389 INFO L93 Difference]: Finished difference Result 309 states and 795 transitions. [2022-02-16 13:52:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:16,390 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:16,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:16,390 INFO L225 Difference]: With dead ends: 309 [2022-02-16 13:52:16,390 INFO L226 Difference]: Without dead ends: 309 [2022-02-16 13:52:16,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:52:16,390 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:16,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 117 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-16 13:52:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 260. [2022-02-16 13:52:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7104247104247103) internal successors, (702), 259 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 702 transitions. [2022-02-16 13:52:16,393 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 702 transitions. Word has length 20 [2022-02-16 13:52:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:16,393 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 702 transitions. [2022-02-16 13:52:16,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 702 transitions. [2022-02-16 13:52:16,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:16,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:16,394 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:16,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-02-16 13:52:16,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-02-16 13:52:16,610 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1908051462, now seen corresponding path program 269 times [2022-02-16 13:52:16,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:16,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819286400] [2022-02-16 13:52:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:16,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:16,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:16,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819286400] [2022-02-16 13:52:16,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819286400] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:16,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587346875] [2022-02-16 13:52:16,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:16,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:16,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:16,697 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:16,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-16 13:52:16,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:16,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:17,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:17,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:17,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:17,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:17,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587346875] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:17,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:17,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:17,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342824518] [2022-02-16 13:52:17,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:17,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:17,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:17,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:17,245 INFO L87 Difference]: Start difference. First operand 260 states and 702 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:17,548 INFO L93 Difference]: Finished difference Result 275 states and 732 transitions. [2022-02-16 13:52:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:17,548 INFO L225 Difference]: With dead ends: 275 [2022-02-16 13:52:17,548 INFO L226 Difference]: Without dead ends: 272 [2022-02-16 13:52:17,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:17,549 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:17,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 80 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-16 13:52:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 261. [2022-02-16 13:52:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.707692307692308) internal successors, (704), 260 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 704 transitions. [2022-02-16 13:52:17,552 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 704 transitions. Word has length 20 [2022-02-16 13:52:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:17,552 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 704 transitions. [2022-02-16 13:52:17,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 704 transitions. [2022-02-16 13:52:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:17,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:17,552 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:17,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:17,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-02-16 13:52:17,763 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2116344770, now seen corresponding path program 270 times [2022-02-16 13:52:17,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:17,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615956685] [2022-02-16 13:52:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:17,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:17,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:17,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615956685] [2022-02-16 13:52:17,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615956685] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:17,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872400336] [2022-02-16 13:52:17,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:17,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:17,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:17,840 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:17,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-16 13:52:18,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:52:18,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:18,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:52:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:18,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:18,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:18,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:18,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872400336] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:18,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:18,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:18,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625670577] [2022-02-16 13:52:18,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:18,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:18,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:18,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:18,482 INFO L87 Difference]: Start difference. First operand 261 states and 704 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:18,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:18,995 INFO L93 Difference]: Finished difference Result 288 states and 749 transitions. [2022-02-16 13:52:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:18,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:18,995 INFO L225 Difference]: With dead ends: 288 [2022-02-16 13:52:18,995 INFO L226 Difference]: Without dead ends: 286 [2022-02-16 13:52:18,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:52:18,996 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:18,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 99 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-02-16 13:52:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 264. [2022-02-16 13:52:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.703422053231939) internal successors, (711), 263 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 711 transitions. [2022-02-16 13:52:18,999 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 711 transitions. Word has length 20 [2022-02-16 13:52:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:18,999 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 711 transitions. [2022-02-16 13:52:18,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 711 transitions. [2022-02-16 13:52:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:18,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:18,999 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:19,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-02-16 13:52:19,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:19,200 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1063524730, now seen corresponding path program 271 times [2022-02-16 13:52:19,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:19,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434392288] [2022-02-16 13:52:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:19,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:19,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:19,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434392288] [2022-02-16 13:52:19,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434392288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:19,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724641443] [2022-02-16 13:52:19,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:19,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:19,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:19,290 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:19,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-16 13:52:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:19,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:19,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:19,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:52:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:19,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:19,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:19,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:19,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724641443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:19,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:19,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:19,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118356712] [2022-02-16 13:52:19,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:19,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:19,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:19,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:19,837 INFO L87 Difference]: Start difference. First operand 264 states and 711 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:20,095 INFO L93 Difference]: Finished difference Result 275 states and 735 transitions. [2022-02-16 13:52:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:20,095 INFO L225 Difference]: With dead ends: 275 [2022-02-16 13:52:20,095 INFO L226 Difference]: Without dead ends: 275 [2022-02-16 13:52:20,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:20,096 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:20,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-16 13:52:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 258. [2022-02-16 13:52:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.6964980544747084) internal successors, (693), 257 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 693 transitions. [2022-02-16 13:52:20,098 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 693 transitions. Word has length 20 [2022-02-16 13:52:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:20,098 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 693 transitions. [2022-02-16 13:52:20,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 693 transitions. [2022-02-16 13:52:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:20,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:20,099 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:20,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-02-16 13:52:20,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:20,315 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1779244184, now seen corresponding path program 272 times [2022-02-16 13:52:20,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:20,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716477429] [2022-02-16 13:52:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:20,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:20,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:20,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716477429] [2022-02-16 13:52:20,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716477429] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:20,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205666123] [2022-02-16 13:52:20,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:52:20,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:20,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:20,377 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:20,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-16 13:52:20,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:20,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:20,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:20,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:20,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:20,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:20,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:20,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:20,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205666123] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:20,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:20,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:20,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087534875] [2022-02-16 13:52:20,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:20,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:20,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:20,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:20,769 INFO L87 Difference]: Start difference. First operand 258 states and 693 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:20,910 INFO L93 Difference]: Finished difference Result 348 states and 868 transitions. [2022-02-16 13:52:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:20,910 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:20,911 INFO L225 Difference]: With dead ends: 348 [2022-02-16 13:52:20,911 INFO L226 Difference]: Without dead ends: 348 [2022-02-16 13:52:20,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:20,911 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:20,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 102 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-16 13:52:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 264. [2022-02-16 13:52:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.6958174904942966) internal successors, (709), 263 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 709 transitions. [2022-02-16 13:52:20,914 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 709 transitions. Word has length 20 [2022-02-16 13:52:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:20,914 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 709 transitions. [2022-02-16 13:52:20,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 709 transitions. [2022-02-16 13:52:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:20,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:20,915 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:20,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-02-16 13:52:21,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:21,131 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1680993964, now seen corresponding path program 273 times [2022-02-16 13:52:21,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:21,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571617488] [2022-02-16 13:52:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:21,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:21,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:21,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571617488] [2022-02-16 13:52:21,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571617488] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:21,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409574754] [2022-02-16 13:52:21,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:52:21,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:21,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:21,200 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:21,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-16 13:52:21,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:52:21,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:21,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:21,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:21,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:21,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:21,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:21,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:21,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409574754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:21,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:21,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:21,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055859146] [2022-02-16 13:52:21,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:21,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:21,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:21,633 INFO L87 Difference]: Start difference. First operand 264 states and 709 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:21,874 INFO L93 Difference]: Finished difference Result 365 states and 891 transitions. [2022-02-16 13:52:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:21,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:21,875 INFO L225 Difference]: With dead ends: 365 [2022-02-16 13:52:21,875 INFO L226 Difference]: Without dead ends: 365 [2022-02-16 13:52:21,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:52:21,875 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 154 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:21,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 167 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-16 13:52:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 266. [2022-02-16 13:52:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.70188679245283) internal successors, (716), 265 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 716 transitions. [2022-02-16 13:52:21,879 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 716 transitions. Word has length 20 [2022-02-16 13:52:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:21,879 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 716 transitions. [2022-02-16 13:52:21,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 716 transitions. [2022-02-16 13:52:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:21,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:21,879 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:21,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-02-16 13:52:22,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:22,083 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:22,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1899440476, now seen corresponding path program 274 times [2022-02-16 13:52:22,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:22,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588540200] [2022-02-16 13:52:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:22,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:22,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:22,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588540200] [2022-02-16 13:52:22,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588540200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:22,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636390810] [2022-02-16 13:52:22,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:52:22,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:22,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:22,179 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:22,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-16 13:52:22,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:52:22,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:22,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:22,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:22,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:22,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:22,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636390810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:22,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:22,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:52:22,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109641146] [2022-02-16 13:52:22,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:22,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:52:22,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:52:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:52:22,764 INFO L87 Difference]: Start difference. First operand 266 states and 716 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:22,973 INFO L93 Difference]: Finished difference Result 350 states and 870 transitions. [2022-02-16 13:52:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:22,973 INFO L225 Difference]: With dead ends: 350 [2022-02-16 13:52:22,974 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:52:22,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:52:22,974 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:22,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 132 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:52:22,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 260. [2022-02-16 13:52:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.7104247104247103) internal successors, (702), 259 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 702 transitions. [2022-02-16 13:52:22,977 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 702 transitions. Word has length 20 [2022-02-16 13:52:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:22,977 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 702 transitions. [2022-02-16 13:52:22,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:22,977 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 702 transitions. [2022-02-16 13:52:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:22,977 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:22,977 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:22,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-02-16 13:52:23,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:23,194 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash 934707207, now seen corresponding path program 275 times [2022-02-16 13:52:23,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:23,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316549896] [2022-02-16 13:52:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:23,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:23,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:23,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316549896] [2022-02-16 13:52:23,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316549896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:23,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976424599] [2022-02-16 13:52:23,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:23,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:23,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:23,266 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:23,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-16 13:52:23,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:52:23,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:23,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:23,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:23,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:52:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:23,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:23,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:23,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:23,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976424599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:23,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:23,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-16 13:52:23,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401022712] [2022-02-16 13:52:23,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:23,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:52:23,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:23,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:52:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:52:23,914 INFO L87 Difference]: Start difference. First operand 260 states and 702 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:24,406 INFO L93 Difference]: Finished difference Result 415 states and 956 transitions. [2022-02-16 13:52:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 13:52:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:24,407 INFO L225 Difference]: With dead ends: 415 [2022-02-16 13:52:24,407 INFO L226 Difference]: Without dead ends: 345 [2022-02-16 13:52:24,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:52:24,407 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 269 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:24,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 165 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-16 13:52:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 255. [2022-02-16 13:52:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.7125984251968505) internal successors, (689), 254 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 689 transitions. [2022-02-16 13:52:24,410 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 689 transitions. Word has length 20 [2022-02-16 13:52:24,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:24,410 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 689 transitions. [2022-02-16 13:52:24,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 689 transitions. [2022-02-16 13:52:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:24,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:24,411 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:24,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:24,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-02-16 13:52:24,626 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:24,626 INFO L85 PathProgramCache]: Analyzing trace with hash 382881068, now seen corresponding path program 276 times [2022-02-16 13:52:24,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:24,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978372669] [2022-02-16 13:52:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:24,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:24,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:24,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978372669] [2022-02-16 13:52:24,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978372669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:24,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738251212] [2022-02-16 13:52:24,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:24,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:24,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:24,750 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:24,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-16 13:52:24,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:52:24,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:24,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:24,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:25,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:25,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:25,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:25,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:25,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738251212] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:25,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:25,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:25,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581431722] [2022-02-16 13:52:25,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:25,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:25,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:25,353 INFO L87 Difference]: Start difference. First operand 255 states and 689 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:25,547 INFO L93 Difference]: Finished difference Result 391 states and 951 transitions. [2022-02-16 13:52:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:25,548 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:25,548 INFO L225 Difference]: With dead ends: 391 [2022-02-16 13:52:25,548 INFO L226 Difference]: Without dead ends: 391 [2022-02-16 13:52:25,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:25,549 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:25,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 161 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-02-16 13:52:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 256. [2022-02-16 13:52:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.7215686274509805) internal successors, (694), 255 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 694 transitions. [2022-02-16 13:52:25,552 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 694 transitions. Word has length 20 [2022-02-16 13:52:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:25,552 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 694 transitions. [2022-02-16 13:52:25,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 694 transitions. [2022-02-16 13:52:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:25,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:25,552 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:25,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:25,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-02-16 13:52:25,768 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:25,769 INFO L85 PathProgramCache]: Analyzing trace with hash -126895384, now seen corresponding path program 277 times [2022-02-16 13:52:25,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:25,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650282234] [2022-02-16 13:52:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:25,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:25,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:25,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650282234] [2022-02-16 13:52:25,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650282234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:25,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274739529] [2022-02-16 13:52:25,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:25,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:25,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:25,866 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:25,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-16 13:52:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:26,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:26,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:26,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:26,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:26,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:26,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:26,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274739529] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:26,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:26,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:26,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754067048] [2022-02-16 13:52:26,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:26,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:26,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:26,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:26,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:26,340 INFO L87 Difference]: Start difference. First operand 256 states and 694 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:26,500 INFO L93 Difference]: Finished difference Result 395 states and 963 transitions. [2022-02-16 13:52:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:26,501 INFO L225 Difference]: With dead ends: 395 [2022-02-16 13:52:26,501 INFO L226 Difference]: Without dead ends: 395 [2022-02-16 13:52:26,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:26,501 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 174 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:26,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 151 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-16 13:52:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 260. [2022-02-16 13:52:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.72972972972973) internal successors, (707), 259 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 707 transitions. [2022-02-16 13:52:26,504 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 707 transitions. Word has length 20 [2022-02-16 13:52:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:26,504 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 707 transitions. [2022-02-16 13:52:26,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 707 transitions. [2022-02-16 13:52:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:26,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:26,505 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:26,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:26,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-02-16 13:52:26,721 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash -322328212, now seen corresponding path program 278 times [2022-02-16 13:52:26,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:26,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782672265] [2022-02-16 13:52:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:26,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:26,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:26,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782672265] [2022-02-16 13:52:26,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782672265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:26,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150873034] [2022-02-16 13:52:26,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:52:26,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:26,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:26,791 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:26,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-16 13:52:26,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:26,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:26,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:26,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:27,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:27,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:27,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:27,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:27,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150873034] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:27,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:27,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:27,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980420952] [2022-02-16 13:52:27,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:27,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:27,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:27,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:27,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:27,242 INFO L87 Difference]: Start difference. First operand 260 states and 707 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:27,386 INFO L93 Difference]: Finished difference Result 380 states and 943 transitions. [2022-02-16 13:52:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:27,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:27,386 INFO L225 Difference]: With dead ends: 380 [2022-02-16 13:52:27,386 INFO L226 Difference]: Without dead ends: 380 [2022-02-16 13:52:27,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:27,387 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 94 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:27,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 145 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-16 13:52:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 255. [2022-02-16 13:52:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.7125984251968505) internal successors, (689), 254 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 689 transitions. [2022-02-16 13:52:27,390 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 689 transitions. Word has length 20 [2022-02-16 13:52:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:27,390 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 689 transitions. [2022-02-16 13:52:27,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 689 transitions. [2022-02-16 13:52:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:27,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:27,390 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:27,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-02-16 13:52:27,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-02-16 13:52:27,606 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:27,607 INFO L85 PathProgramCache]: Analyzing trace with hash 107036717, now seen corresponding path program 279 times [2022-02-16 13:52:27,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:27,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982487051] [2022-02-16 13:52:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:27,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:27,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:27,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982487051] [2022-02-16 13:52:27,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982487051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:27,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165965925] [2022-02-16 13:52:27,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:52:27,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:27,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:27,652 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:27,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-16 13:52:27,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:52:27,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:27,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:27,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:27,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:52:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:28,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:28,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:28,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:28,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165965925] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:28,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:28,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-02-16 13:52:28,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902811452] [2022-02-16 13:52:28,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:28,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:52:28,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:52:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:52:28,151 INFO L87 Difference]: Start difference. First operand 255 states and 689 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:28,410 INFO L93 Difference]: Finished difference Result 352 states and 863 transitions. [2022-02-16 13:52:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:28,411 INFO L225 Difference]: With dead ends: 352 [2022-02-16 13:52:28,411 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:52:28,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:28,411 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:28,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 134 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:52:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 252. [2022-02-16 13:52:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.6772908366533863) internal successors, (672), 251 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 672 transitions. [2022-02-16 13:52:28,414 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 672 transitions. Word has length 20 [2022-02-16 13:52:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:28,414 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 672 transitions. [2022-02-16 13:52:28,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 672 transitions. [2022-02-16 13:52:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:28,415 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:28,415 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:28,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:28,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-02-16 13:52:28,630 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash -236170320, now seen corresponding path program 280 times [2022-02-16 13:52:28,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:28,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025573824] [2022-02-16 13:52:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:28,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:28,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:28,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025573824] [2022-02-16 13:52:28,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025573824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:28,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075509449] [2022-02-16 13:52:28,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:52:28,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:28,703 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:28,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-16 13:52:28,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:52:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:28,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:29,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:29,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:29,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:29,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075509449] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:29,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:29,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:29,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146195775] [2022-02-16 13:52:29,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:29,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:29,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:29,241 INFO L87 Difference]: Start difference. First operand 252 states and 672 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:29,574 INFO L93 Difference]: Finished difference Result 427 states and 989 transitions. [2022-02-16 13:52:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:29,574 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:29,575 INFO L225 Difference]: With dead ends: 427 [2022-02-16 13:52:29,575 INFO L226 Difference]: Without dead ends: 427 [2022-02-16 13:52:29,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:52:29,575 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 152 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:29,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 169 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-02-16 13:52:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 258. [2022-02-16 13:52:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.692607003891051) internal successors, (692), 257 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:29,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 692 transitions. [2022-02-16 13:52:29,579 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 692 transitions. Word has length 20 [2022-02-16 13:52:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:29,579 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 692 transitions. [2022-02-16 13:52:29,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 692 transitions. [2022-02-16 13:52:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:29,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:29,579 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:29,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:29,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:29,796 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 478362536, now seen corresponding path program 281 times [2022-02-16 13:52:29,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:29,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590981928] [2022-02-16 13:52:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:29,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:29,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:29,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590981928] [2022-02-16 13:52:29,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590981928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:29,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218293661] [2022-02-16 13:52:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:29,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:29,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:29,896 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:29,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-16 13:52:30,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:52:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:30,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:30,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:30,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:30,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:30,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:30,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218293661] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:30,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:30,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:30,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428017746] [2022-02-16 13:52:30,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:30,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:30,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:30,495 INFO L87 Difference]: Start difference. First operand 258 states and 692 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:30,721 INFO L93 Difference]: Finished difference Result 403 states and 959 transitions. [2022-02-16 13:52:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:30,722 INFO L225 Difference]: With dead ends: 403 [2022-02-16 13:52:30,722 INFO L226 Difference]: Without dead ends: 402 [2022-02-16 13:52:30,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:30,723 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:30,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 126 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-02-16 13:52:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 255. [2022-02-16 13:52:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.6929133858267718) internal successors, (684), 254 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 684 transitions. [2022-02-16 13:52:30,726 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 684 transitions. Word has length 20 [2022-02-16 13:52:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:30,726 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 684 transitions. [2022-02-16 13:52:30,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 684 transitions. [2022-02-16 13:52:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:30,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:30,726 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:30,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:30,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-02-16 13:52:30,942 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -27877012, now seen corresponding path program 282 times [2022-02-16 13:52:30,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:30,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605929287] [2022-02-16 13:52:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:30,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:31,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:31,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605929287] [2022-02-16 13:52:31,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605929287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:31,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206136976] [2022-02-16 13:52:31,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:31,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:31,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:31,053 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:31,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-16 13:52:31,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:52:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:31,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:31,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:31,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:31,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:31,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206136976] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:31,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:31,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:31,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076730918] [2022-02-16 13:52:31,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:31,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:31,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:31,660 INFO L87 Difference]: Start difference. First operand 255 states and 684 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:31,935 INFO L93 Difference]: Finished difference Result 424 states and 1004 transitions. [2022-02-16 13:52:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:31,936 INFO L225 Difference]: With dead ends: 424 [2022-02-16 13:52:31,936 INFO L226 Difference]: Without dead ends: 424 [2022-02-16 13:52:31,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:31,936 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:31,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 143 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-02-16 13:52:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 257. [2022-02-16 13:52:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.70703125) internal successors, (693), 256 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 693 transitions. [2022-02-16 13:52:31,939 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 693 transitions. Word has length 20 [2022-02-16 13:52:31,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:31,939 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 693 transitions. [2022-02-16 13:52:31,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 693 transitions. [2022-02-16 13:52:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:31,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:31,940 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:31,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:32,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:32,151 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:32,151 INFO L85 PathProgramCache]: Analyzing trace with hash 661844912, now seen corresponding path program 283 times [2022-02-16 13:52:32,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:32,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709504608] [2022-02-16 13:52:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:32,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:32,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:32,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709504608] [2022-02-16 13:52:32,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709504608] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:32,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715756971] [2022-02-16 13:52:32,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:32,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:32,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:32,245 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:32,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-16 13:52:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:32,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:32,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:32,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:32,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:32,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:32,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:32,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715756971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:32,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:32,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:32,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918970058] [2022-02-16 13:52:32,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:32,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:32,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:32,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:32,789 INFO L87 Difference]: Start difference. First operand 257 states and 693 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:32,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:32,958 INFO L93 Difference]: Finished difference Result 410 states and 989 transitions. [2022-02-16 13:52:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:32,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:32,959 INFO L225 Difference]: With dead ends: 410 [2022-02-16 13:52:32,959 INFO L226 Difference]: Without dead ends: 410 [2022-02-16 13:52:32,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:32,960 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:32,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 150 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-16 13:52:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 255. [2022-02-16 13:52:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.6929133858267718) internal successors, (684), 254 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 684 transitions. [2022-02-16 13:52:32,964 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 684 transitions. Word has length 20 [2022-02-16 13:52:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:32,964 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 684 transitions. [2022-02-16 13:52:32,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 684 transitions. [2022-02-16 13:52:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:32,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:32,964 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:32,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-02-16 13:52:33,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:33,179 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1980330332, now seen corresponding path program 284 times [2022-02-16 13:52:33,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:33,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383209377] [2022-02-16 13:52:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:33,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:33,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:33,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383209377] [2022-02-16 13:52:33,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383209377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:33,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682176816] [2022-02-16 13:52:33,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:52:33,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:33,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:33,255 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:33,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-16 13:52:33,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:33,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:33,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:33,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:33,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:33,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:33,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:33,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:33,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682176816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:33,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:33,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:33,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560195282] [2022-02-16 13:52:33,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:33,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:33,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:33,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:33,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:33,731 INFO L87 Difference]: Start difference. First operand 255 states and 684 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:33,892 INFO L93 Difference]: Finished difference Result 386 states and 934 transitions. [2022-02-16 13:52:33,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:33,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:33,892 INFO L225 Difference]: With dead ends: 386 [2022-02-16 13:52:33,893 INFO L226 Difference]: Without dead ends: 384 [2022-02-16 13:52:33,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:33,893 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:33,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 139 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-02-16 13:52:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 258. [2022-02-16 13:52:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.688715953307393) internal successors, (691), 257 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 691 transitions. [2022-02-16 13:52:33,920 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 691 transitions. Word has length 20 [2022-02-16 13:52:33,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:33,920 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 691 transitions. [2022-02-16 13:52:33,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:33,920 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 691 transitions. [2022-02-16 13:52:33,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:33,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:33,920 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:33,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:34,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:34,135 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash -865232536, now seen corresponding path program 285 times [2022-02-16 13:52:34,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:34,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134897133] [2022-02-16 13:52:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:34,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:34,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:34,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134897133] [2022-02-16 13:52:34,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134897133] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:34,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927657652] [2022-02-16 13:52:34,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:52:34,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:34,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:34,229 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:34,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-16 13:52:34,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:52:34,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:34,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:34,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:34,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:52:34,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:34,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:34,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:34,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:34,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927657652] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:34,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:34,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:34,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483917277] [2022-02-16 13:52:34,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:34,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:34,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:34,882 INFO L87 Difference]: Start difference. First operand 258 states and 691 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:35,100 INFO L93 Difference]: Finished difference Result 288 states and 781 transitions. [2022-02-16 13:52:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:35,101 INFO L225 Difference]: With dead ends: 288 [2022-02-16 13:52:35,101 INFO L226 Difference]: Without dead ends: 288 [2022-02-16 13:52:35,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:35,101 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:35,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 101 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 487 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-02-16 13:52:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-16 13:52:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 259. [2022-02-16 13:52:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.689922480620155) internal successors, (694), 258 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 694 transitions. [2022-02-16 13:52:35,104 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 694 transitions. Word has length 20 [2022-02-16 13:52:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:35,104 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 694 transitions. [2022-02-16 13:52:35,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 694 transitions. [2022-02-16 13:52:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:35,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:35,105 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:35,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:35,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:35,315 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:35,315 INFO L85 PathProgramCache]: Analyzing trace with hash 833645156, now seen corresponding path program 286 times [2022-02-16 13:52:35,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:35,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375906108] [2022-02-16 13:52:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:35,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:35,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:35,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375906108] [2022-02-16 13:52:35,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375906108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:35,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96123920] [2022-02-16 13:52:35,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:52:35,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:35,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:35,453 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:35,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-02-16 13:52:35,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:52:35,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:35,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:35,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:36,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:36,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:36,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96123920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:36,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:36,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:36,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629630408] [2022-02-16 13:52:36,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:36,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:36,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:36,087 INFO L87 Difference]: Start difference. First operand 259 states and 694 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:36,374 INFO L93 Difference]: Finished difference Result 389 states and 943 transitions. [2022-02-16 13:52:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:52:36,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:36,375 INFO L225 Difference]: With dead ends: 389 [2022-02-16 13:52:36,375 INFO L226 Difference]: Without dead ends: 389 [2022-02-16 13:52:36,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:52:36,375 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 84 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:36,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 164 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-16 13:52:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 255. [2022-02-16 13:52:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.677165354330709) internal successors, (680), 254 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 680 transitions. [2022-02-16 13:52:36,378 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 680 transitions. Word has length 20 [2022-02-16 13:52:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:36,378 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 680 transitions. [2022-02-16 13:52:36,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 680 transitions. [2022-02-16 13:52:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:36,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:36,379 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:36,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-02-16 13:52:36,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-02-16 13:52:36,595 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash -253585786, now seen corresponding path program 287 times [2022-02-16 13:52:36,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:36,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328965038] [2022-02-16 13:52:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:36,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:36,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:36,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328965038] [2022-02-16 13:52:36,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328965038] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:36,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276942134] [2022-02-16 13:52:36,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:36,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:36,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:36,695 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:36,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-02-16 13:52:36,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:52:36,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:36,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:36,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:36,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:52:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:37,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:37,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:37,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:37,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276942134] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:37,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:37,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:37,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801713249] [2022-02-16 13:52:37,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:37,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:37,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:37,251 INFO L87 Difference]: Start difference. First operand 255 states and 680 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:37,449 INFO L93 Difference]: Finished difference Result 339 states and 853 transitions. [2022-02-16 13:52:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:37,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:37,450 INFO L225 Difference]: With dead ends: 339 [2022-02-16 13:52:37,450 INFO L226 Difference]: Without dead ends: 339 [2022-02-16 13:52:37,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:37,450 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 101 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:37,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 124 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-16 13:52:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 255. [2022-02-16 13:52:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.677165354330709) internal successors, (680), 254 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 680 transitions. [2022-02-16 13:52:37,453 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 680 transitions. Word has length 20 [2022-02-16 13:52:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:37,453 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 680 transitions. [2022-02-16 13:52:37,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 680 transitions. [2022-02-16 13:52:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:37,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:37,454 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:37,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-02-16 13:52:37,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-02-16 13:52:37,658 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash -763362238, now seen corresponding path program 288 times [2022-02-16 13:52:37,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:37,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724356063] [2022-02-16 13:52:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:37,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:37,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:37,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724356063] [2022-02-16 13:52:37,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724356063] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:37,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593011393] [2022-02-16 13:52:37,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:37,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:37,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:37,758 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:37,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-02-16 13:52:37,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:52:37,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:38,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:52:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:38,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:38,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:38,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:38,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593011393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:38,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:38,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:38,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397917767] [2022-02-16 13:52:38,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:38,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:38,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:38,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:38,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:38,361 INFO L87 Difference]: Start difference. First operand 255 states and 680 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:38,654 INFO L93 Difference]: Finished difference Result 350 states and 866 transitions. [2022-02-16 13:52:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:38,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:38,655 INFO L225 Difference]: With dead ends: 350 [2022-02-16 13:52:38,655 INFO L226 Difference]: Without dead ends: 350 [2022-02-16 13:52:38,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:38,656 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:38,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 151 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:52:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-16 13:52:38,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 258. [2022-02-16 13:52:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.67704280155642) internal successors, (688), 257 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 688 transitions. [2022-02-16 13:52:38,660 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 688 transitions. Word has length 20 [2022-02-16 13:52:38,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:38,660 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 688 transitions. [2022-02-16 13:52:38,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 688 transitions. [2022-02-16 13:52:38,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:38,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:38,661 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:38,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:38,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:38,868 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash -958795066, now seen corresponding path program 289 times [2022-02-16 13:52:38,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:38,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925016681] [2022-02-16 13:52:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:38,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:38,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:38,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925016681] [2022-02-16 13:52:38,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925016681] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:38,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733159209] [2022-02-16 13:52:38,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:38,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:38,948 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:38,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-02-16 13:52:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:39,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:52:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:39,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:39,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:39,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:39,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733159209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:39,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:39,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:39,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927832075] [2022-02-16 13:52:39,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:39,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:39,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:39,466 INFO L87 Difference]: Start difference. First operand 258 states and 688 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:39,674 INFO L93 Difference]: Finished difference Result 329 states and 839 transitions. [2022-02-16 13:52:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:39,675 INFO L225 Difference]: With dead ends: 329 [2022-02-16 13:52:39,675 INFO L226 Difference]: Without dead ends: 329 [2022-02-16 13:52:39,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:39,675 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:39,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 142 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-16 13:52:39,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 251. [2022-02-16 13:52:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.66) internal successors, (665), 250 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 665 transitions. [2022-02-16 13:52:39,678 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 665 transitions. Word has length 20 [2022-02-16 13:52:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:39,678 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 665 transitions. [2022-02-16 13:52:39,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:39,678 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 665 transitions. [2022-02-16 13:52:39,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:39,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:39,678 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:39,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:39,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-02-16 13:52:39,894 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:39,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1869205420, now seen corresponding path program 290 times [2022-02-16 13:52:39,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:39,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621901766] [2022-02-16 13:52:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:39,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:39,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:39,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621901766] [2022-02-16 13:52:39,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621901766] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:39,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35624771] [2022-02-16 13:52:39,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:52:39,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:39,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:39,986 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:39,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-02-16 13:52:40,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:40,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:40,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:40,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:52:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:40,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:40,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:40,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:40,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35624771] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:40,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:40,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:40,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124183896] [2022-02-16 13:52:40,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:40,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:40,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:40,540 INFO L87 Difference]: Start difference. First operand 251 states and 665 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:40,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:40,707 INFO L93 Difference]: Finished difference Result 302 states and 768 transitions. [2022-02-16 13:52:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:40,708 INFO L225 Difference]: With dead ends: 302 [2022-02-16 13:52:40,708 INFO L226 Difference]: Without dead ends: 302 [2022-02-16 13:52:40,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:40,708 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:40,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 132 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-16 13:52:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 255. [2022-02-16 13:52:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.6811023622047245) internal successors, (681), 254 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 681 transitions. [2022-02-16 13:52:40,711 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 681 transitions. Word has length 20 [2022-02-16 13:52:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:40,711 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 681 transitions. [2022-02-16 13:52:40,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 681 transitions. [2022-02-16 13:52:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:40,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:40,711 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:40,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-02-16 13:52:40,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:40,924 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1673772592, now seen corresponding path program 291 times [2022-02-16 13:52:40,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:40,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092618336] [2022-02-16 13:52:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:40,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:41,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:41,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092618336] [2022-02-16 13:52:41,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092618336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:41,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371983962] [2022-02-16 13:52:41,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:52:41,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:41,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:41,047 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:41,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-02-16 13:52:41,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:52:41,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:41,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:41,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:41,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:52:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:41,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:41,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:41,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:41,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371983962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:41,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:41,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:41,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699647059] [2022-02-16 13:52:41,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:41,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:41,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:41,691 INFO L87 Difference]: Start difference. First operand 255 states and 681 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:41,868 INFO L93 Difference]: Finished difference Result 305 states and 773 transitions. [2022-02-16 13:52:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:52:41,868 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:41,868 INFO L225 Difference]: With dead ends: 305 [2022-02-16 13:52:41,868 INFO L226 Difference]: Without dead ends: 305 [2022-02-16 13:52:41,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:41,869 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:41,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 119 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-16 13:52:41,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 255. [2022-02-16 13:52:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.661417322834646) internal successors, (676), 254 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 676 transitions. [2022-02-16 13:52:41,872 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 676 transitions. Word has length 20 [2022-02-16 13:52:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:41,872 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 676 transitions. [2022-02-16 13:52:41,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 676 transitions. [2022-02-16 13:52:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:41,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:41,873 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:41,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:42,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:42,089 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1676398368, now seen corresponding path program 292 times [2022-02-16 13:52:42,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:42,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176751689] [2022-02-16 13:52:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:42,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:42,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:42,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176751689] [2022-02-16 13:52:42,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176751689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:42,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530151270] [2022-02-16 13:52:42,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:52:42,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:42,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:42,161 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:42,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-02-16 13:52:42,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:52:42,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:42,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:42,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:42,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:42,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:42,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530151270] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:42,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:42,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:42,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446142441] [2022-02-16 13:52:42,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:42,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:42,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:42,716 INFO L87 Difference]: Start difference. First operand 255 states and 676 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:42,949 INFO L93 Difference]: Finished difference Result 280 states and 730 transitions. [2022-02-16 13:52:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:42,950 INFO L225 Difference]: With dead ends: 280 [2022-02-16 13:52:42,950 INFO L226 Difference]: Without dead ends: 280 [2022-02-16 13:52:42,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:42,950 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:42,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 102 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-02-16 13:52:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 249. [2022-02-16 13:52:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.657258064516129) internal successors, (659), 248 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 659 transitions. [2022-02-16 13:52:42,953 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 659 transitions. Word has length 20 [2022-02-16 13:52:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:42,953 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 659 transitions. [2022-02-16 13:52:42,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:42,953 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 659 transitions. [2022-02-16 13:52:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:42,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:42,953 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:42,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:43,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-02-16 13:52:43,154 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash -741585755, now seen corresponding path program 293 times [2022-02-16 13:52:43,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:43,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588138358] [2022-02-16 13:52:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:43,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:43,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:43,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588138358] [2022-02-16 13:52:43,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588138358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:43,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20299867] [2022-02-16 13:52:43,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:43,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:43,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:43,209 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:43,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-02-16 13:52:43,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:43,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:43,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:43,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:43,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:43,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:43,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:43,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:43,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20299867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:43,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:43,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-02-16 13:52:43,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924577735] [2022-02-16 13:52:43,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:43,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:52:43,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:43,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:52:43,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:52:43,742 INFO L87 Difference]: Start difference. First operand 249 states and 659 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:43,998 INFO L93 Difference]: Finished difference Result 293 states and 736 transitions. [2022-02-16 13:52:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:43,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:43,999 INFO L225 Difference]: With dead ends: 293 [2022-02-16 13:52:43,999 INFO L226 Difference]: Without dead ends: 245 [2022-02-16 13:52:43,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:52:43,999 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:43,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 100 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-16 13:52:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 239. [2022-02-16 13:52:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.634453781512605) internal successors, (627), 238 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 627 transitions. [2022-02-16 13:52:44,002 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 627 transitions. Word has length 20 [2022-02-16 13:52:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:44,002 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 627 transitions. [2022-02-16 13:52:44,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 627 transitions. [2022-02-16 13:52:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:44,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:44,002 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:44,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-02-16 13:52:44,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:44,211 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:44,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1509104028, now seen corresponding path program 294 times [2022-02-16 13:52:44,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:44,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068436831] [2022-02-16 13:52:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:44,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:44,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:44,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068436831] [2022-02-16 13:52:44,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068436831] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:44,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432140440] [2022-02-16 13:52:44,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:44,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:44,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:44,310 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:44,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-02-16 13:52:44,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:52:44,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:44,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:44,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:44,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:52:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:44,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:44,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:44,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:44,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432140440] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:44,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:44,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:44,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806482073] [2022-02-16 13:52:44,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:44,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:44,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:44,968 INFO L87 Difference]: Start difference. First operand 239 states and 627 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:45,269 INFO L93 Difference]: Finished difference Result 349 states and 838 transitions. [2022-02-16 13:52:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:45,270 INFO L225 Difference]: With dead ends: 349 [2022-02-16 13:52:45,270 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:52:45,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:52:45,270 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:45,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 147 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:52:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 247. [2022-02-16 13:52:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6666666666666665) internal successors, (656), 246 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 656 transitions. [2022-02-16 13:52:45,274 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 656 transitions. Word has length 20 [2022-02-16 13:52:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:45,274 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 656 transitions. [2022-02-16 13:52:45,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 656 transitions. [2022-02-16 13:52:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:45,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:45,274 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:45,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-02-16 13:52:45,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:45,488 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash -794571172, now seen corresponding path program 295 times [2022-02-16 13:52:45,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:45,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631124435] [2022-02-16 13:52:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:45,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:45,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:45,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631124435] [2022-02-16 13:52:45,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631124435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:45,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291817211] [2022-02-16 13:52:45,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:45,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:45,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:45,571 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:45,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-02-16 13:52:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:45,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:45,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:52:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:45,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:46,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:46,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:46,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291817211] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:46,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:46,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:46,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064737431] [2022-02-16 13:52:46,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:46,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:46,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:46,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:46,184 INFO L87 Difference]: Start difference. First operand 247 states and 656 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:46,422 INFO L93 Difference]: Finished difference Result 325 states and 808 transitions. [2022-02-16 13:52:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:46,423 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:46,423 INFO L225 Difference]: With dead ends: 325 [2022-02-16 13:52:46,423 INFO L226 Difference]: Without dead ends: 324 [2022-02-16 13:52:46,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:46,423 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:46,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 126 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-16 13:52:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 244. [2022-02-16 13:52:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6666666666666665) internal successors, (648), 243 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 648 transitions. [2022-02-16 13:52:46,426 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 648 transitions. Word has length 20 [2022-02-16 13:52:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:46,426 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 648 transitions. [2022-02-16 13:52:46,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 648 transitions. [2022-02-16 13:52:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:46,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:46,427 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:46,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:46,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:46,639 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:46,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:46,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1300810720, now seen corresponding path program 296 times [2022-02-16 13:52:46,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:46,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891663226] [2022-02-16 13:52:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:46,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:46,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:46,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891663226] [2022-02-16 13:52:46,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891663226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:46,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54964266] [2022-02-16 13:52:46,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:52:46,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:46,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:46,745 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:46,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-02-16 13:52:46,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:46,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:46,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:47,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:52:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:47,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:47,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:47,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:47,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54964266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:47,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:47,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:47,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748898803] [2022-02-16 13:52:47,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:47,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:47,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:47,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:47,344 INFO L87 Difference]: Start difference. First operand 244 states and 648 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:47,676 INFO L93 Difference]: Finished difference Result 362 states and 875 transitions. [2022-02-16 13:52:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:47,676 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:47,677 INFO L225 Difference]: With dead ends: 362 [2022-02-16 13:52:47,677 INFO L226 Difference]: Without dead ends: 362 [2022-02-16 13:52:47,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:52:47,677 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 130 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:47,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 179 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-16 13:52:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 246. [2022-02-16 13:52:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6816326530612247) internal successors, (657), 245 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 657 transitions. [2022-02-16 13:52:47,681 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 657 transitions. Word has length 20 [2022-02-16 13:52:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:47,681 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 657 transitions. [2022-02-16 13:52:47,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 657 transitions. [2022-02-16 13:52:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:47,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:47,682 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:47,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:47,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:47,894 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:47,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:47,895 INFO L85 PathProgramCache]: Analyzing trace with hash -611088796, now seen corresponding path program 297 times [2022-02-16 13:52:47,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:47,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147112055] [2022-02-16 13:52:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:47,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:47,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:47,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147112055] [2022-02-16 13:52:47,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147112055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:47,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429567924] [2022-02-16 13:52:47,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:52:47,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:47,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:47,994 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:47,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-02-16 13:52:48,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:52:48,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:48,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:48,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:48,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:52:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:48,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:48,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:48,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:48,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429567924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:48,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:48,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:48,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539328867] [2022-02-16 13:52:48,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:48,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:48,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:48,582 INFO L87 Difference]: Start difference. First operand 246 states and 657 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:48,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:48,896 INFO L93 Difference]: Finished difference Result 348 states and 860 transitions. [2022-02-16 13:52:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:48,897 INFO L225 Difference]: With dead ends: 348 [2022-02-16 13:52:48,897 INFO L226 Difference]: Without dead ends: 348 [2022-02-16 13:52:48,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:52:48,897 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:48,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 196 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:48,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-16 13:52:48,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2022-02-16 13:52:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6666666666666665) internal successors, (648), 243 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 648 transitions. [2022-02-16 13:52:48,917 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 648 transitions. Word has length 20 [2022-02-16 13:52:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:48,917 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 648 transitions. [2022-02-16 13:52:48,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 648 transitions. [2022-02-16 13:52:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:48,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:48,917 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:48,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:49,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:49,138 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1041703256, now seen corresponding path program 298 times [2022-02-16 13:52:49,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:49,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957113921] [2022-02-16 13:52:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:49,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:49,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:49,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957113921] [2022-02-16 13:52:49,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957113921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:49,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810080815] [2022-02-16 13:52:49,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:52:49,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:49,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:49,214 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:49,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-02-16 13:52:49,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:52:49,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:49,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:49,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:52:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:49,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:49,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:49,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:49,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810080815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:49,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:49,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:49,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852367065] [2022-02-16 13:52:49,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:49,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:49,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:49,781 INFO L87 Difference]: Start difference. First operand 244 states and 648 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:50,083 INFO L93 Difference]: Finished difference Result 345 states and 835 transitions. [2022-02-16 13:52:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:52:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:50,084 INFO L225 Difference]: With dead ends: 345 [2022-02-16 13:52:50,084 INFO L226 Difference]: Without dead ends: 343 [2022-02-16 13:52:50,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:52:50,084 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 136 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:50,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 154 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-16 13:52:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 247. [2022-02-16 13:52:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.66260162601626) internal successors, (655), 246 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 655 transitions. [2022-02-16 13:52:50,087 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 655 transitions. Word has length 20 [2022-02-16 13:52:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:50,087 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 655 transitions. [2022-02-16 13:52:50,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 655 transitions. [2022-02-16 13:52:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:50,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:50,088 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:50,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:50,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:50,297 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166244, now seen corresponding path program 299 times [2022-02-16 13:52:50,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:50,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656018324] [2022-02-16 13:52:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:50,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:50,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:50,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656018324] [2022-02-16 13:52:50,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656018324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:50,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415823581] [2022-02-16 13:52:50,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:50,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:50,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:50,407 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:50,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-02-16 13:52:50,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:52:50,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:50,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:52:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:50,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:51,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:51,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:51,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415823581] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:51,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:51,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:51,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141116052] [2022-02-16 13:52:51,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:51,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:51,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:51,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:51,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:51,086 INFO L87 Difference]: Start difference. First operand 247 states and 655 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:51,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:51,521 INFO L93 Difference]: Finished difference Result 347 states and 841 transitions. [2022-02-16 13:52:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:52:51,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:51,521 INFO L225 Difference]: With dead ends: 347 [2022-02-16 13:52:51,522 INFO L226 Difference]: Without dead ends: 347 [2022-02-16 13:52:51,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:52:51,522 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:51,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 186 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-16 13:52:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 245. [2022-02-16 13:52:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6557377049180326) internal successors, (648), 244 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 648 transitions. [2022-02-16 13:52:51,525 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 648 transitions. Word has length 20 [2022-02-16 13:52:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:51,525 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 648 transitions. [2022-02-16 13:52:51,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 648 transitions. [2022-02-16 13:52:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:51,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:51,525 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:51,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-02-16 13:52:51,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:51,735 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:51,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:51,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1726699398, now seen corresponding path program 300 times [2022-02-16 13:52:51,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:51,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100440060] [2022-02-16 13:52:51,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:51,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:51,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:51,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100440060] [2022-02-16 13:52:51,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100440060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:51,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775700374] [2022-02-16 13:52:51,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:51,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:51,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:51,848 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:51,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-02-16 13:52:52,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:52:52,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:52,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:52,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-02-16 13:52:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:52,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:52,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:52,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:52,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775700374] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:52,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:52,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:52,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080721886] [2022-02-16 13:52:52,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:52,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:52,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:52,521 INFO L87 Difference]: Start difference. First operand 245 states and 648 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:52,795 INFO L93 Difference]: Finished difference Result 316 states and 799 transitions. [2022-02-16 13:52:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:52,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:52,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:52,796 INFO L225 Difference]: With dead ends: 316 [2022-02-16 13:52:52,796 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:52:52,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:52,796 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:52,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 123 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:52:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 246. [2022-02-16 13:52:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6612244897959183) internal successors, (652), 245 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 652 transitions. [2022-02-16 13:52:52,799 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 652 transitions. Word has length 20 [2022-02-16 13:52:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:52,799 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 652 transitions. [2022-02-16 13:52:52,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:52,800 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 652 transitions. [2022-02-16 13:52:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:52,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:52,800 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:52,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:53,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-02-16 13:52:53,000 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:53,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1878545974, now seen corresponding path program 301 times [2022-02-16 13:52:53,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:53,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959974290] [2022-02-16 13:52:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:53,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:53,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:53,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959974290] [2022-02-16 13:52:53,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959974290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:53,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245485430] [2022-02-16 13:52:53,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:52:53,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:53,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:53,121 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:53,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-02-16 13:52:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:53,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:53,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:53,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-02-16 13:52:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:53,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:53,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:53,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:53,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245485430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:53,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:53,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:53,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757536931] [2022-02-16 13:52:53,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:53,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:53,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:53,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:53,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:53,772 INFO L87 Difference]: Start difference. First operand 246 states and 652 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:54,068 INFO L93 Difference]: Finished difference Result 314 states and 796 transitions. [2022-02-16 13:52:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:52:54,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:54,069 INFO L225 Difference]: With dead ends: 314 [2022-02-16 13:52:54,069 INFO L226 Difference]: Without dead ends: 314 [2022-02-16 13:52:54,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:52:54,069 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:54,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 136 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-16 13:52:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 242. [2022-02-16 13:52:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6473029045643153) internal successors, (638), 241 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 638 transitions. [2022-02-16 13:52:54,072 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 638 transitions. Word has length 20 [2022-02-16 13:52:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:54,072 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 638 transitions. [2022-02-16 13:52:54,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 638 transitions. [2022-02-16 13:52:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:54,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:54,072 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:54,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:54,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-02-16 13:52:54,287 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2120994140, now seen corresponding path program 302 times [2022-02-16 13:52:54,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:54,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567125720] [2022-02-16 13:52:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:54,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:54,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:54,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567125720] [2022-02-16 13:52:54,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567125720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:54,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237492609] [2022-02-16 13:52:54,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:52:54,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:54,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:54,414 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:54,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-02-16 13:52:54,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:52:54,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:54,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:54,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:55,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:55,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:55,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237492609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:55,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:55,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:55,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248321449] [2022-02-16 13:52:55,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:55,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:55,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:55,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:55,117 INFO L87 Difference]: Start difference. First operand 242 states and 638 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:55,416 INFO L93 Difference]: Finished difference Result 289 states and 750 transitions. [2022-02-16 13:52:55,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:55,416 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:55,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:55,417 INFO L225 Difference]: With dead ends: 289 [2022-02-16 13:52:55,417 INFO L226 Difference]: Without dead ends: 289 [2022-02-16 13:52:55,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:55,417 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:55,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 110 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-16 13:52:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 240. [2022-02-16 13:52:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6401673640167362) internal successors, (631), 239 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 631 transitions. [2022-02-16 13:52:55,420 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 631 transitions. Word has length 20 [2022-02-16 13:52:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:55,420 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 631 transitions. [2022-02-16 13:52:55,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 631 transitions. [2022-02-16 13:52:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:55,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:55,420 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:55,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:55,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-02-16 13:52:55,627 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1956784744, now seen corresponding path program 303 times [2022-02-16 13:52:55,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:55,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71836195] [2022-02-16 13:52:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:55,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:55,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:55,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71836195] [2022-02-16 13:52:55,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71836195] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:55,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703581814] [2022-02-16 13:52:55,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:52:55,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:55,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:55,734 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:55,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-02-16 13:52:55,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:52:55,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:55,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:55,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:56,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:56,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:56,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:56,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:56,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703581814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:56,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:56,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:52:56,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151851506] [2022-02-16 13:52:56,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:56,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:52:56,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:56,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:52:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:52:56,335 INFO L87 Difference]: Start difference. First operand 240 states and 631 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:56,495 INFO L93 Difference]: Finished difference Result 288 states and 733 transitions. [2022-02-16 13:52:56,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:56,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:56,495 INFO L225 Difference]: With dead ends: 288 [2022-02-16 13:52:56,495 INFO L226 Difference]: Without dead ends: 286 [2022-02-16 13:52:56,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:52:56,495 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:56,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 107 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:52:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-02-16 13:52:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 245. [2022-02-16 13:52:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6352459016393444) internal successors, (643), 244 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 643 transitions. [2022-02-16 13:52:56,498 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 643 transitions. Word has length 20 [2022-02-16 13:52:56,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:56,498 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 643 transitions. [2022-02-16 13:52:56,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 643 transitions. [2022-02-16 13:52:56,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:56,499 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:56,499 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:56,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:56,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:56,715 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:56,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:56,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1223084756, now seen corresponding path program 304 times [2022-02-16 13:52:56,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:56,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759670304] [2022-02-16 13:52:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:56,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:56,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:56,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759670304] [2022-02-16 13:52:56,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759670304] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:56,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857809640] [2022-02-16 13:52:56,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:52:56,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:56,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:56,819 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:56,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-02-16 13:52:57,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:52:57,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:57,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:57,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:57,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:52:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:57,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:57,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:57,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:57,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857809640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:57,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:57,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:52:57,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435410614] [2022-02-16 13:52:57,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:57,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:52:57,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:57,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:52:57,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:52:57,436 INFO L87 Difference]: Start difference. First operand 245 states and 643 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:57,717 INFO L93 Difference]: Finished difference Result 290 states and 739 transitions. [2022-02-16 13:52:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:52:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:57,718 INFO L225 Difference]: With dead ends: 290 [2022-02-16 13:52:57,718 INFO L226 Difference]: Without dead ends: 290 [2022-02-16 13:52:57,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:52:57,718 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 81 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:57,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 115 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-16 13:52:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 244. [2022-02-16 13:52:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6378600823045266) internal successors, (641), 243 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 641 transitions. [2022-02-16 13:52:57,721 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 641 transitions. Word has length 20 [2022-02-16 13:52:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:57,721 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 641 transitions. [2022-02-16 13:52:57,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 641 transitions. [2022-02-16 13:52:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:57,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:57,721 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:57,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:57,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-02-16 13:52:57,921 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:57,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash 260050182, now seen corresponding path program 305 times [2022-02-16 13:52:57,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:57,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017993257] [2022-02-16 13:52:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:57,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:58,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:58,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017993257] [2022-02-16 13:52:58,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017993257] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:58,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273235867] [2022-02-16 13:52:58,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:52:58,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:58,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:58,005 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:58,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-02-16 13:52:58,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:52:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:58,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:58,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:58,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:52:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:58,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273235867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:58,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:58,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:58,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118707077] [2022-02-16 13:52:58,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:58,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:58,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:58,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:58,551 INFO L87 Difference]: Start difference. First operand 244 states and 641 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:52:58,820 INFO L93 Difference]: Finished difference Result 275 states and 720 transitions. [2022-02-16 13:52:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:52:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:52:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:52:58,821 INFO L225 Difference]: With dead ends: 275 [2022-02-16 13:52:58,821 INFO L226 Difference]: Without dead ends: 275 [2022-02-16 13:52:58,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:52:58,821 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:52:58,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 119 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:52:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-16 13:52:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 238. [2022-02-16 13:52:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.632911392405063) internal successors, (624), 237 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 624 transitions. [2022-02-16 13:52:58,824 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 624 transitions. Word has length 20 [2022-02-16 13:52:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:52:58,824 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 624 transitions. [2022-02-16 13:52:58,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:52:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 624 transitions. [2022-02-16 13:52:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:52:58,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:52:58,824 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:52:58,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-02-16 13:52:59,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:59,041 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:52:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:52:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1290398420, now seen corresponding path program 306 times [2022-02-16 13:52:59,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:52:59,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772345928] [2022-02-16 13:52:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:52:59,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:52:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:52:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:59,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:52:59,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772345928] [2022-02-16 13:52:59,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772345928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:52:59,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917594254] [2022-02-16 13:52:59,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:52:59,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:52:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:52:59,129 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:52:59,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-02-16 13:52:59,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:52:59,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:52:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:52:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:52:59,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:52:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:59,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:52:59,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:52:59,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:52:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:52:59,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917594254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:52:59,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:52:59,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:52:59,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544343] [2022-02-16 13:52:59,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:52:59,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:52:59,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:52:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:52:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:52:59,827 INFO L87 Difference]: Start difference. First operand 238 states and 624 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:00,057 INFO L93 Difference]: Finished difference Result 263 states and 672 transitions. [2022-02-16 13:53:00,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:00,057 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:00,058 INFO L225 Difference]: With dead ends: 263 [2022-02-16 13:53:00,058 INFO L226 Difference]: Without dead ends: 263 [2022-02-16 13:53:00,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:00,058 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:00,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 75 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-16 13:53:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 243. [2022-02-16 13:53:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.644628099173554) internal successors, (640), 242 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:00,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 640 transitions. [2022-02-16 13:53:00,061 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 640 transitions. Word has length 20 [2022-02-16 13:53:00,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:00,061 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 640 transitions. [2022-02-16 13:53:00,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 640 transitions. [2022-02-16 13:53:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:00,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:00,061 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:00,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:00,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:00,271 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash -575865564, now seen corresponding path program 307 times [2022-02-16 13:53:00,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:00,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144795616] [2022-02-16 13:53:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:00,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:00,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:00,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144795616] [2022-02-16 13:53:00,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144795616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:00,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719215684] [2022-02-16 13:53:00,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:53:00,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:00,387 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:00,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-02-16 13:53:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:00,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:00,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:00,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:53:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:00,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:00,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:00,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:01,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719215684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:01,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:01,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:01,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832239052] [2022-02-16 13:53:01,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:01,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:01,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:01,147 INFO L87 Difference]: Start difference. First operand 243 states and 640 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:01,464 INFO L93 Difference]: Finished difference Result 264 states and 672 transitions. [2022-02-16 13:53:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:53:01,464 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:01,464 INFO L225 Difference]: With dead ends: 264 [2022-02-16 13:53:01,464 INFO L226 Difference]: Without dead ends: 263 [2022-02-16 13:53:01,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:01,465 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:01,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 71 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-16 13:53:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 242. [2022-02-16 13:53:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6431535269709543) internal successors, (637), 241 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 637 transitions. [2022-02-16 13:53:01,467 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 637 transitions. Word has length 20 [2022-02-16 13:53:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:01,467 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 637 transitions. [2022-02-16 13:53:01,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 637 transitions. [2022-02-16 13:53:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:01,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:01,468 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:01,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-02-16 13:53:01,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2022-02-16 13:53:01,684 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash 11879758, now seen corresponding path program 308 times [2022-02-16 13:53:01,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:01,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065296884] [2022-02-16 13:53:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:01,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:01,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:01,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065296884] [2022-02-16 13:53:01,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065296884] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:01,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116226899] [2022-02-16 13:53:01,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:53:01,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:01,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:01,769 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:01,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-02-16 13:53:01,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:01,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:01,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:02,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:02,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:02,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:02,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:02,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:02,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116226899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:02,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:02,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:02,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319298466] [2022-02-16 13:53:02,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:02,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:02,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:02,430 INFO L87 Difference]: Start difference. First operand 242 states and 637 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:02,669 INFO L93 Difference]: Finished difference Result 251 states and 655 transitions. [2022-02-16 13:53:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:02,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:02,670 INFO L225 Difference]: With dead ends: 251 [2022-02-16 13:53:02,670 INFO L226 Difference]: Without dead ends: 249 [2022-02-16 13:53:02,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:02,670 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:02,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 65 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-16 13:53:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2022-02-16 13:53:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6485355648535567) internal successors, (633), 239 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 633 transitions. [2022-02-16 13:53:02,673 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 633 transitions. Word has length 20 [2022-02-16 13:53:02,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:02,674 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 633 transitions. [2022-02-16 13:53:02,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 633 transitions. [2022-02-16 13:53:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:02,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:02,674 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:02,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:02,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:02,896 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 871726832, now seen corresponding path program 309 times [2022-02-16 13:53:02,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:02,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37182398] [2022-02-16 13:53:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:02,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:03,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:03,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37182398] [2022-02-16 13:53:03,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37182398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:03,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773343832] [2022-02-16 13:53:03,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:53:03,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:03,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:03,012 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:03,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-02-16 13:53:03,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:53:03,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:03,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:03,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 83 [2022-02-16 13:53:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:03,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:03,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:03,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:03,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773343832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:03,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:03,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:03,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287803774] [2022-02-16 13:53:03,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:03,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:03,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:03,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:03,944 INFO L87 Difference]: Start difference. First operand 240 states and 633 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:04,347 INFO L93 Difference]: Finished difference Result 304 states and 738 transitions. [2022-02-16 13:53:04,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:04,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:04,348 INFO L225 Difference]: With dead ends: 304 [2022-02-16 13:53:04,348 INFO L226 Difference]: Without dead ends: 304 [2022-02-16 13:53:04,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:53:04,348 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:04,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 131 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-16 13:53:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 246. [2022-02-16 13:53:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6653061224489796) internal successors, (653), 245 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 653 transitions. [2022-02-16 13:53:04,351 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 653 transitions. Word has length 20 [2022-02-16 13:53:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:04,351 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 653 transitions. [2022-02-16 13:53:04,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 653 transitions. [2022-02-16 13:53:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:04,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:04,352 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:04,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-02-16 13:53:04,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-02-16 13:53:04,552 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:04,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1586259688, now seen corresponding path program 310 times [2022-02-16 13:53:04,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:04,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136471597] [2022-02-16 13:53:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:04,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:04,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:04,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136471597] [2022-02-16 13:53:04,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136471597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:04,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851606112] [2022-02-16 13:53:04,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:53:04,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:04,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:04,682 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:04,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-02-16 13:53:04,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:53:04,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:05,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 83 [2022-02-16 13:53:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:05,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:05,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:05,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:05,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851606112] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:05,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:05,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:05,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286886632] [2022-02-16 13:53:05,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:05,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:05,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:05,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:05,609 INFO L87 Difference]: Start difference. First operand 246 states and 653 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:06,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:06,060 INFO L93 Difference]: Finished difference Result 314 states and 746 transitions. [2022-02-16 13:53:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:53:06,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:06,062 INFO L225 Difference]: With dead ends: 314 [2022-02-16 13:53:06,062 INFO L226 Difference]: Without dead ends: 313 [2022-02-16 13:53:06,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:53:06,062 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 136 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:06,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 165 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:06,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-16 13:53:06,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 243. [2022-02-16 13:53:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.665289256198347) internal successors, (645), 242 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 645 transitions. [2022-02-16 13:53:06,065 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 645 transitions. Word has length 20 [2022-02-16 13:53:06,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:06,066 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 645 transitions. [2022-02-16 13:53:06,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 645 transitions. [2022-02-16 13:53:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:06,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:06,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:06,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-02-16 13:53:06,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-02-16 13:53:06,282 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:06,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1080020140, now seen corresponding path program 311 times [2022-02-16 13:53:06,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:06,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385549661] [2022-02-16 13:53:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:06,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:06,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:06,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385549661] [2022-02-16 13:53:06,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385549661] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:06,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518613466] [2022-02-16 13:53:06,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:53:06,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:06,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:06,431 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:06,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-02-16 13:53:06,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:53:06,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:06,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:06,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:06,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:53:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:06,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:07,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:07,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:07,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518613466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:07,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:07,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:07,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612107190] [2022-02-16 13:53:07,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:07,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:07,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:07,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:07,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:07,191 INFO L87 Difference]: Start difference. First operand 243 states and 645 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:07,467 INFO L93 Difference]: Finished difference Result 306 states and 740 transitions. [2022-02-16 13:53:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:07,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:07,468 INFO L225 Difference]: With dead ends: 306 [2022-02-16 13:53:07,468 INFO L226 Difference]: Without dead ends: 306 [2022-02-16 13:53:07,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:07,468 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:07,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 117 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-02-16 13:53:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 243. [2022-02-16 13:53:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6735537190082646) internal successors, (647), 242 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 647 transitions. [2022-02-16 13:53:07,471 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 647 transitions. Word has length 20 [2022-02-16 13:53:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:07,471 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 647 transitions. [2022-02-16 13:53:07,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 647 transitions. [2022-02-16 13:53:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:07,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:07,472 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:07,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:07,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-02-16 13:53:07,688 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1769742064, now seen corresponding path program 312 times [2022-02-16 13:53:07,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:07,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312469751] [2022-02-16 13:53:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:07,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:07,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:07,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312469751] [2022-02-16 13:53:07,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312469751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:07,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471632911] [2022-02-16 13:53:07,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:53:07,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:07,789 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:07,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-02-16 13:53:07,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:53:07,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:07,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:07,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:08,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:53:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:08,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:08,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:08,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:08,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471632911] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:08,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:08,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:08,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554620559] [2022-02-16 13:53:08,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:08,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:08,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:08,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:08,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:08,597 INFO L87 Difference]: Start difference. First operand 243 states and 647 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:08,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:08,919 INFO L93 Difference]: Finished difference Result 291 states and 720 transitions. [2022-02-16 13:53:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:53:08,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:08,919 INFO L225 Difference]: With dead ends: 291 [2022-02-16 13:53:08,919 INFO L226 Difference]: Without dead ends: 291 [2022-02-16 13:53:08,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:08,920 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:08,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 130 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-16 13:53:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 241. [2022-02-16 13:53:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.658333333333333) internal successors, (638), 240 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 638 transitions. [2022-02-16 13:53:08,922 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 638 transitions. Word has length 20 [2022-02-16 13:53:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:08,923 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 638 transitions. [2022-02-16 13:53:08,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 638 transitions. [2022-02-16 13:53:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:08,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:08,923 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:08,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:09,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:09,123 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash -872433180, now seen corresponding path program 313 times [2022-02-16 13:53:09,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:09,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066868177] [2022-02-16 13:53:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:09,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:09,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:09,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066868177] [2022-02-16 13:53:09,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066868177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:09,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390178401] [2022-02-16 13:53:09,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:53:09,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:09,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:09,237 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:09,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-02-16 13:53:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:09,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:09,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:09,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:53:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:09,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:09,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:09,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:09,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390178401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:09,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:09,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:09,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413507201] [2022-02-16 13:53:09,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:09,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:09,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:09,891 INFO L87 Difference]: Start difference. First operand 241 states and 638 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:10,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:10,381 INFO L93 Difference]: Finished difference Result 297 states and 730 transitions. [2022-02-16 13:53:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:53:10,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:10,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:10,382 INFO L225 Difference]: With dead ends: 297 [2022-02-16 13:53:10,382 INFO L226 Difference]: Without dead ends: 295 [2022-02-16 13:53:10,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:53:10,382 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:10,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 137 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:10,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-16 13:53:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 244. [2022-02-16 13:53:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.654320987654321) internal successors, (645), 243 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 645 transitions. [2022-02-16 13:53:10,385 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 645 transitions. Word has length 20 [2022-02-16 13:53:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:10,385 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 645 transitions. [2022-02-16 13:53:10,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 645 transitions. [2022-02-16 13:53:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:10,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:10,385 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:10,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-02-16 13:53:10,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:10,594 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash 242664616, now seen corresponding path program 314 times [2022-02-16 13:53:10,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:10,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005787899] [2022-02-16 13:53:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:10,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:10,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:10,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005787899] [2022-02-16 13:53:10,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005787899] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:10,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525931850] [2022-02-16 13:53:10,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:53:10,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:10,714 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:10,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-02-16 13:53:10,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:10,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:11,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:53:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:11,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:11,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:11,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:11,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525931850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:11,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:11,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:11,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144646925] [2022-02-16 13:53:11,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:11,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:11,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:11,472 INFO L87 Difference]: Start difference. First operand 244 states and 645 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:11,794 INFO L93 Difference]: Finished difference Result 284 states and 716 transitions. [2022-02-16 13:53:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:11,795 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:11,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:11,795 INFO L225 Difference]: With dead ends: 284 [2022-02-16 13:53:11,795 INFO L226 Difference]: Without dead ends: 284 [2022-02-16 13:53:11,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:53:11,795 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:11,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 141 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-16 13:53:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2022-02-16 13:53:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6485355648535567) internal successors, (633), 239 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 633 transitions. [2022-02-16 13:53:11,798 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 633 transitions. Word has length 20 [2022-02-16 13:53:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:11,798 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 633 transitions. [2022-02-16 13:53:11,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 633 transitions. [2022-02-16 13:53:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:11,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:11,798 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:11,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:12,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-02-16 13:53:12,015 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:12,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:12,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1101812178, now seen corresponding path program 315 times [2022-02-16 13:53:12,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:12,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093769526] [2022-02-16 13:53:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:12,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:12,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:12,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093769526] [2022-02-16 13:53:12,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093769526] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:12,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61543349] [2022-02-16 13:53:12,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:53:12,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:12,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:12,115 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:12,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-02-16 13:53:12,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:53:12,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:12,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:12,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:12,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:12,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:12,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:12,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61543349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:12,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:12,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:12,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356092915] [2022-02-16 13:53:12,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:12,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:12,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:12,811 INFO L87 Difference]: Start difference. First operand 240 states and 633 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:13,134 INFO L93 Difference]: Finished difference Result 253 states and 658 transitions. [2022-02-16 13:53:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:13,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:13,135 INFO L225 Difference]: With dead ends: 253 [2022-02-16 13:53:13,135 INFO L226 Difference]: Without dead ends: 250 [2022-02-16 13:53:13,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:13,135 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:13,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 87 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-16 13:53:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 241. [2022-02-16 13:53:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6458333333333335) internal successors, (635), 240 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 635 transitions. [2022-02-16 13:53:13,137 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 635 transitions. Word has length 20 [2022-02-16 13:53:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:13,137 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 635 transitions. [2022-02-16 13:53:13,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 635 transitions. [2022-02-16 13:53:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:13,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:13,138 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:13,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:13,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-02-16 13:53:13,338 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:13,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1310105486, now seen corresponding path program 316 times [2022-02-16 13:53:13,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:13,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140456498] [2022-02-16 13:53:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:13,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:13,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:13,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140456498] [2022-02-16 13:53:13,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140456498] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:13,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089487078] [2022-02-16 13:53:13,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:53:13,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:13,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:13,424 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:13,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-02-16 13:53:13,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:53:13,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:13,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:13,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:13,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:53:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:13,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:14,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:14,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:14,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089487078] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:14,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:14,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:14,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091990696] [2022-02-16 13:53:14,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:14,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:14,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:14,164 INFO L87 Difference]: Start difference. First operand 241 states and 635 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:14,526 INFO L93 Difference]: Finished difference Result 266 states and 675 transitions. [2022-02-16 13:53:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:14,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:14,526 INFO L225 Difference]: With dead ends: 266 [2022-02-16 13:53:14,526 INFO L226 Difference]: Without dead ends: 264 [2022-02-16 13:53:14,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:14,527 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 81 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:14,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 112 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-16 13:53:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 244. [2022-02-16 13:53:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6419753086419755) internal successors, (642), 243 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 642 transitions. [2022-02-16 13:53:14,529 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 642 transitions. Word has length 20 [2022-02-16 13:53:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:14,529 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 642 transitions. [2022-02-16 13:53:14,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 642 transitions. [2022-02-16 13:53:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:14,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:14,530 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:14,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:14,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:14,746 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1869764014, now seen corresponding path program 317 times [2022-02-16 13:53:14,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:14,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274969427] [2022-02-16 13:53:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:14,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:14,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:14,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274969427] [2022-02-16 13:53:14,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274969427] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:14,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548668764] [2022-02-16 13:53:14,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:53:14,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:14,903 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:14,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-02-16 13:53:15,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:53:15,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:15,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:15,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:53:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:15,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:15,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:15,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:15,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548668764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:15,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:15,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:53:15,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801444701] [2022-02-16 13:53:15,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:15,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:53:15,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:15,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:53:15,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:53:15,540 INFO L87 Difference]: Start difference. First operand 244 states and 642 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:15,801 INFO L93 Difference]: Finished difference Result 253 states and 661 transitions. [2022-02-16 13:53:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:15,801 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:15,801 INFO L225 Difference]: With dead ends: 253 [2022-02-16 13:53:15,801 INFO L226 Difference]: Without dead ends: 253 [2022-02-16 13:53:15,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:15,802 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:15,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:15,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-16 13:53:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 239. [2022-02-16 13:53:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.638655462184874) internal successors, (628), 238 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 628 transitions. [2022-02-16 13:53:15,804 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 628 transitions. Word has length 20 [2022-02-16 13:53:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:15,804 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 628 transitions. [2022-02-16 13:53:15,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 628 transitions. [2022-02-16 13:53:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:15,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:15,805 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:15,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:16,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:16,021 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:16,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:16,021 INFO L85 PathProgramCache]: Analyzing trace with hash 235259978, now seen corresponding path program 318 times [2022-02-16 13:53:16,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:16,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081882588] [2022-02-16 13:53:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:16,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:16,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:16,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081882588] [2022-02-16 13:53:16,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081882588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:16,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856151208] [2022-02-16 13:53:16,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:53:16,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:16,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:16,137 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:16,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-02-16 13:53:16,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:53:16,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:16,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:53:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:16,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:16,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:16,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:16,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856151208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:16,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:16,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:16,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541278246] [2022-02-16 13:53:16,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:16,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:16,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:16,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:16,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:16,794 INFO L87 Difference]: Start difference. First operand 239 states and 628 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:17,026 INFO L93 Difference]: Finished difference Result 292 states and 728 transitions. [2022-02-16 13:53:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:17,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:17,027 INFO L225 Difference]: With dead ends: 292 [2022-02-16 13:53:17,027 INFO L226 Difference]: Without dead ends: 292 [2022-02-16 13:53:17,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:17,027 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:17,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 113 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-16 13:53:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 247. [2022-02-16 13:53:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6707317073170733) internal successors, (657), 246 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 657 transitions. [2022-02-16 13:53:17,030 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 657 transitions. Word has length 20 [2022-02-16 13:53:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:17,030 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 657 transitions. [2022-02-16 13:53:17,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 657 transitions. [2022-02-16 13:53:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:17,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:17,031 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:17,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-02-16 13:53:17,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:17,247 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:17,247 INFO L85 PathProgramCache]: Analyzing trace with hash 949792834, now seen corresponding path program 319 times [2022-02-16 13:53:17,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:17,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64475556] [2022-02-16 13:53:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:17,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:17,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:17,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64475556] [2022-02-16 13:53:17,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64475556] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:17,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867237994] [2022-02-16 13:53:17,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:53:17,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:17,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:17,360 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:17,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-02-16 13:53:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:17,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:17,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:17,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:53:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:17,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:18,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:18,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:18,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867237994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:18,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:18,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:18,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505946544] [2022-02-16 13:53:18,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:18,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:18,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:18,094 INFO L87 Difference]: Start difference. First operand 247 states and 657 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:18,351 INFO L93 Difference]: Finished difference Result 302 states and 736 transitions. [2022-02-16 13:53:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:53:18,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:18,351 INFO L225 Difference]: With dead ends: 302 [2022-02-16 13:53:18,351 INFO L226 Difference]: Without dead ends: 301 [2022-02-16 13:53:18,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:18,352 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:18,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 121 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-16 13:53:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 244. [2022-02-16 13:53:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6707818930041154) internal successors, (649), 243 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 649 transitions. [2022-02-16 13:53:18,355 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 649 transitions. Word has length 20 [2022-02-16 13:53:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:18,355 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 649 transitions. [2022-02-16 13:53:18,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 649 transitions. [2022-02-16 13:53:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:18,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:18,355 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:18,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-02-16 13:53:18,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-02-16 13:53:18,571 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash 443553286, now seen corresponding path program 320 times [2022-02-16 13:53:18,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:18,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472585734] [2022-02-16 13:53:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:18,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:18,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:18,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472585734] [2022-02-16 13:53:18,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472585734] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:18,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962534305] [2022-02-16 13:53:18,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:53:18,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:18,691 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:18,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-02-16 13:53:18,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:18,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:18,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:19,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:53:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:19,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:19,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:19,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:19,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962534305] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:19,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:19,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:19,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118671629] [2022-02-16 13:53:19,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:19,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:19,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:19,402 INFO L87 Difference]: Start difference. First operand 244 states and 649 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:19,753 INFO L93 Difference]: Finished difference Result 319 states and 771 transitions. [2022-02-16 13:53:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:19,753 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:19,753 INFO L225 Difference]: With dead ends: 319 [2022-02-16 13:53:19,754 INFO L226 Difference]: Without dead ends: 319 [2022-02-16 13:53:19,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:19,754 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:19,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 155 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-02-16 13:53:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 246. [2022-02-16 13:53:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6857142857142855) internal successors, (658), 245 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 658 transitions. [2022-02-16 13:53:19,757 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 658 transitions. Word has length 20 [2022-02-16 13:53:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:19,757 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 658 transitions. [2022-02-16 13:53:19,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 658 transitions. [2022-02-16 13:53:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:19,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:19,757 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:19,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:19,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-02-16 13:53:19,973 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:19,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1133275210, now seen corresponding path program 321 times [2022-02-16 13:53:19,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:19,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181700211] [2022-02-16 13:53:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:19,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:20,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:20,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181700211] [2022-02-16 13:53:20,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181700211] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:20,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892451176] [2022-02-16 13:53:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:53:20,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:20,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:20,089 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:20,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-02-16 13:53:20,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:53:20,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:20,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:20,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:20,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:53:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:20,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:20,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:20,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:20,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892451176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:20,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:20,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:20,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747526193] [2022-02-16 13:53:20,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:20,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:20,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:20,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:20,840 INFO L87 Difference]: Start difference. First operand 246 states and 658 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:21,214 INFO L93 Difference]: Finished difference Result 317 states and 768 transitions. [2022-02-16 13:53:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:53:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:21,215 INFO L225 Difference]: With dead ends: 317 [2022-02-16 13:53:21,215 INFO L226 Difference]: Without dead ends: 317 [2022-02-16 13:53:21,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:53:21,215 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:21,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 155 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:21,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-16 13:53:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 244. [2022-02-16 13:53:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6707818930041154) internal successors, (649), 243 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 649 transitions. [2022-02-16 13:53:21,219 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 649 transitions. Word has length 20 [2022-02-16 13:53:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:21,219 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 649 transitions. [2022-02-16 13:53:21,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 649 transitions. [2022-02-16 13:53:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:21,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:21,220 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:21,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:21,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-02-16 13:53:21,436 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:21,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1508900034, now seen corresponding path program 322 times [2022-02-16 13:53:21,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:21,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056212823] [2022-02-16 13:53:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:21,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:21,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:21,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056212823] [2022-02-16 13:53:21,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056212823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:21,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800103959] [2022-02-16 13:53:21,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:53:21,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:21,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:21,544 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:21,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-02-16 13:53:21,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:53:21,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:21,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:21,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:21,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:53:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:22,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:22,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:22,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:22,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800103959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:22,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:22,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:22,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57016489] [2022-02-16 13:53:22,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:22,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:22,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:22,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:22,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:22,284 INFO L87 Difference]: Start difference. First operand 244 states and 649 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:22,667 INFO L93 Difference]: Finished difference Result 318 states and 767 transitions. [2022-02-16 13:53:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:22,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:22,668 INFO L225 Difference]: With dead ends: 318 [2022-02-16 13:53:22,668 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:53:22,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:22,668 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:22,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 169 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:53:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 247. [2022-02-16 13:53:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6666666666666665) internal successors, (656), 246 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 656 transitions. [2022-02-16 13:53:22,671 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 656 transitions. Word has length 20 [2022-02-16 13:53:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:22,671 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 656 transitions. [2022-02-16 13:53:22,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 656 transitions. [2022-02-16 13:53:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:22,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:22,671 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:22,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:22,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-02-16 13:53:22,872 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:22,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:22,872 INFO L85 PathProgramCache]: Analyzing trace with hash -393802238, now seen corresponding path program 323 times [2022-02-16 13:53:22,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:22,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683165907] [2022-02-16 13:53:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:22,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:23,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:23,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683165907] [2022-02-16 13:53:23,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683165907] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:23,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417144614] [2022-02-16 13:53:23,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:53:23,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:23,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:23,033 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:23,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-02-16 13:53:23,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:53:23,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:23,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:23,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 13:53:23,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:53:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:23,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:23,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:23,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:23,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417144614] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:23,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:23,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:23,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543176380] [2022-02-16 13:53:23,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:23,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:23,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:23,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:23,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:23,870 INFO L87 Difference]: Start difference. First operand 247 states and 656 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:24,195 INFO L93 Difference]: Finished difference Result 285 states and 726 transitions. [2022-02-16 13:53:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:53:24,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:24,196 INFO L225 Difference]: With dead ends: 285 [2022-02-16 13:53:24,196 INFO L226 Difference]: Without dead ends: 285 [2022-02-16 13:53:24,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:24,196 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:24,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 119 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 497 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-02-16 13:53:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-16 13:53:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 245. [2022-02-16 13:53:24,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6598360655737703) internal successors, (649), 244 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 649 transitions. [2022-02-16 13:53:24,199 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 649 transitions. Word has length 20 [2022-02-16 13:53:24,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:24,199 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 649 transitions. [2022-02-16 13:53:24,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 649 transitions. [2022-02-16 13:53:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:24,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:24,199 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:24,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-02-16 13:53:24,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:24,407 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:24,407 INFO L85 PathProgramCache]: Analyzing trace with hash -823903892, now seen corresponding path program 324 times [2022-02-16 13:53:24,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:24,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327747846] [2022-02-16 13:53:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:24,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:24,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:24,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327747846] [2022-02-16 13:53:24,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327747846] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:24,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580278124] [2022-02-16 13:53:24,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:53:24,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:24,498 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:24,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-02-16 13:53:24,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:53:24,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:24,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:24,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:53:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:24,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:25,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:25,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:25,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580278124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:25,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:25,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:25,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067013599] [2022-02-16 13:53:25,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:25,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:25,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:25,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:25,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:25,141 INFO L87 Difference]: Start difference. First operand 245 states and 649 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:25,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:25,417 INFO L93 Difference]: Finished difference Result 288 states and 727 transitions. [2022-02-16 13:53:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:25,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:25,418 INFO L225 Difference]: With dead ends: 288 [2022-02-16 13:53:25,418 INFO L226 Difference]: Without dead ends: 288 [2022-02-16 13:53:25,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:25,418 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:25,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 105 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-16 13:53:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 246. [2022-02-16 13:53:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6653061224489796) internal successors, (653), 245 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 653 transitions. [2022-02-16 13:53:25,421 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 653 transitions. Word has length 20 [2022-02-16 13:53:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:25,421 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 653 transitions. [2022-02-16 13:53:25,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 653 transitions. [2022-02-16 13:53:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:25,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:25,421 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:25,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-02-16 13:53:25,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-02-16 13:53:25,635 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash -134181968, now seen corresponding path program 325 times [2022-02-16 13:53:25,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:25,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234725814] [2022-02-16 13:53:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:25,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:25,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:25,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234725814] [2022-02-16 13:53:25,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234725814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:25,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097349881] [2022-02-16 13:53:25,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:53:25,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:25,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:25,780 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:25,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-02-16 13:53:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:25,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:25,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:26,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:53:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:26,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:26,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:26,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:26,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097349881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:26,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:26,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:26,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584479163] [2022-02-16 13:53:26,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:26,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:26,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:26,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:26,525 INFO L87 Difference]: Start difference. First operand 246 states and 653 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:26,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:26,914 INFO L93 Difference]: Finished difference Result 295 states and 733 transitions. [2022-02-16 13:53:26,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:26,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:26,915 INFO L225 Difference]: With dead ends: 295 [2022-02-16 13:53:26,915 INFO L226 Difference]: Without dead ends: 295 [2022-02-16 13:53:26,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:53:26,915 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:26,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 124 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-16 13:53:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 242. [2022-02-16 13:53:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6514522821576763) internal successors, (639), 241 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 639 transitions. [2022-02-16 13:53:26,918 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 639 transitions. Word has length 20 [2022-02-16 13:53:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:26,918 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 639 transitions. [2022-02-16 13:53:26,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 639 transitions. [2022-02-16 13:53:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:26,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:26,918 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:26,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-02-16 13:53:27,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:27,119 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:27,119 INFO L85 PathProgramCache]: Analyzing trace with hash -429609150, now seen corresponding path program 326 times [2022-02-16 13:53:27,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:27,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380480649] [2022-02-16 13:53:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:27,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:27,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:27,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380480649] [2022-02-16 13:53:27,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380480649] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:27,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273350663] [2022-02-16 13:53:27,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:53:27,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:27,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:27,218 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:27,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-02-16 13:53:27,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:27,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:27,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:27,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:27,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:27,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:27,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273350663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:27,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:27,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:53:27,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642168397] [2022-02-16 13:53:27,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:27,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:53:27,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:27,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:53:27,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:53:27,956 INFO L87 Difference]: Start difference. First operand 242 states and 639 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:28,190 INFO L93 Difference]: Finished difference Result 256 states and 669 transitions. [2022-02-16 13:53:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:28,190 INFO L225 Difference]: With dead ends: 256 [2022-02-16 13:53:28,190 INFO L226 Difference]: Without dead ends: 256 [2022-02-16 13:53:28,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:53:28,191 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:28,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 61 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-16 13:53:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 240. [2022-02-16 13:53:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6443514644351462) internal successors, (632), 239 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 632 transitions. [2022-02-16 13:53:28,193 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 632 transitions. Word has length 20 [2022-02-16 13:53:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:28,193 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 632 transitions. [2022-02-16 13:53:28,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 632 transitions. [2022-02-16 13:53:28,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:28,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:28,194 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:28,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:28,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:28,394 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:28,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:28,395 INFO L85 PathProgramCache]: Analyzing trace with hash -593818546, now seen corresponding path program 327 times [2022-02-16 13:53:28,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:28,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527517241] [2022-02-16 13:53:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:28,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:28,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:28,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527517241] [2022-02-16 13:53:28,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527517241] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:28,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556026971] [2022-02-16 13:53:28,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:53:28,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:28,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:28,548 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:28,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-02-16 13:53:28,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:53:28,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:28,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:28,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:29,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:29,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:29,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:29,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:29,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556026971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:29,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:29,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:53:29,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059062698] [2022-02-16 13:53:29,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:29,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:53:29,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:29,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:53:29,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:53:29,275 INFO L87 Difference]: Start difference. First operand 240 states and 632 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:29,541 INFO L93 Difference]: Finished difference Result 275 states and 695 transitions. [2022-02-16 13:53:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:29,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:29,542 INFO L225 Difference]: With dead ends: 275 [2022-02-16 13:53:29,542 INFO L226 Difference]: Without dead ends: 273 [2022-02-16 13:53:29,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:29,542 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:29,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 121 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-02-16 13:53:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 245. [2022-02-16 13:53:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.639344262295082) internal successors, (644), 244 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 644 transitions. [2022-02-16 13:53:29,545 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 644 transitions. Word has length 20 [2022-02-16 13:53:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:29,545 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 644 transitions. [2022-02-16 13:53:29,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 644 transitions. [2022-02-16 13:53:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:29,546 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:29,546 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:29,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:29,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2022-02-16 13:53:29,759 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:29,760 INFO L85 PathProgramCache]: Analyzing trace with hash 521279250, now seen corresponding path program 328 times [2022-02-16 13:53:29,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:29,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143647843] [2022-02-16 13:53:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:29,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:29,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:29,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143647843] [2022-02-16 13:53:29,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143647843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:29,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635944665] [2022-02-16 13:53:29,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:53:29,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:29,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:29,863 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:29,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-02-16 13:53:30,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:53:30,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:30,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:30,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:30,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:30,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:30,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:30,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:30,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635944665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:30,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:30,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:30,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189192365] [2022-02-16 13:53:30,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:30,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:30,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:30,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:30,599 INFO L87 Difference]: Start difference. First operand 245 states and 644 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:30,831 INFO L93 Difference]: Finished difference Result 277 states and 701 transitions. [2022-02-16 13:53:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:53:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:30,831 INFO L225 Difference]: With dead ends: 277 [2022-02-16 13:53:30,831 INFO L226 Difference]: Without dead ends: 277 [2022-02-16 13:53:30,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:30,832 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:30,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 100 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-02-16 13:53:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 244. [2022-02-16 13:53:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6419753086419755) internal successors, (642), 243 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 642 transitions. [2022-02-16 13:53:30,834 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 642 transitions. Word has length 20 [2022-02-16 13:53:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:30,834 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 642 transitions. [2022-02-16 13:53:30,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 642 transitions. [2022-02-16 13:53:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:30,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:30,835 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:30,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-02-16 13:53:31,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:31,047 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:31,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2004414188, now seen corresponding path program 329 times [2022-02-16 13:53:31,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:31,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812764002] [2022-02-16 13:53:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:31,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:31,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:31,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812764002] [2022-02-16 13:53:31,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812764002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:31,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394769575] [2022-02-16 13:53:31,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:53:31,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:31,148 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:31,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-02-16 13:53:31,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:53:31,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:31,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:31,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:31,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:31,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:31,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:31,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394769575] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:31,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:31,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:31,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450915035] [2022-02-16 13:53:31,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:31,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:31,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:31,900 INFO L87 Difference]: Start difference. First operand 244 states and 642 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:32,233 INFO L93 Difference]: Finished difference Result 262 states and 682 transitions. [2022-02-16 13:53:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:32,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:32,234 INFO L225 Difference]: With dead ends: 262 [2022-02-16 13:53:32,234 INFO L226 Difference]: Without dead ends: 262 [2022-02-16 13:53:32,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:32,234 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:32,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 93 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-16 13:53:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 239. [2022-02-16 13:53:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.638655462184874) internal successors, (628), 238 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 628 transitions. [2022-02-16 13:53:32,237 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 628 transitions. Word has length 20 [2022-02-16 13:53:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:32,237 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 628 transitions. [2022-02-16 13:53:32,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 628 transitions. [2022-02-16 13:53:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:32,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:32,237 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:32,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:32,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:32,447 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash -595432766, now seen corresponding path program 330 times [2022-02-16 13:53:32,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:32,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985233877] [2022-02-16 13:53:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:32,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:32,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:32,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985233877] [2022-02-16 13:53:32,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985233877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:32,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447771946] [2022-02-16 13:53:32,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:53:32,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:32,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:32,564 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:32,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-02-16 13:53:32,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:53:32,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:32,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:32,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:32,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:33,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:33,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:33,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447771946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:33,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:33,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:53:33,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119577825] [2022-02-16 13:53:33,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:33,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:53:33,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:53:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:53:33,187 INFO L87 Difference]: Start difference. First operand 239 states and 628 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:33,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:33,453 INFO L93 Difference]: Finished difference Result 247 states and 645 transitions. [2022-02-16 13:53:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:33,454 INFO L225 Difference]: With dead ends: 247 [2022-02-16 13:53:33,454 INFO L226 Difference]: Without dead ends: 244 [2022-02-16 13:53:33,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:53:33,454 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:33,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 68 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-16 13:53:33,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2022-02-16 13:53:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6333333333333333) internal successors, (632), 240 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 632 transitions. [2022-02-16 13:53:33,457 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 632 transitions. Word has length 20 [2022-02-16 13:53:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:33,457 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 632 transitions. [2022-02-16 13:53:33,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:33,457 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 632 transitions. [2022-02-16 13:53:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:33,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:33,457 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:33,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-02-16 13:53:33,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-02-16 13:53:33,658 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash -387139458, now seen corresponding path program 331 times [2022-02-16 13:53:33,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:33,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391139113] [2022-02-16 13:53:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:33,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:33,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:33,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391139113] [2022-02-16 13:53:33,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391139113] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:33,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661331378] [2022-02-16 13:53:33,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:53:33,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:33,833 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:33,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-02-16 13:53:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:34,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:34,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:34,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:53:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:34,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:34,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:34,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:34,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661331378] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:34,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:34,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:53:34,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65124901] [2022-02-16 13:53:34,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:34,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:53:34,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:53:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:53:34,400 INFO L87 Difference]: Start difference. First operand 241 states and 632 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:34,709 INFO L93 Difference]: Finished difference Result 260 states and 662 transitions. [2022-02-16 13:53:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:34,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:34,710 INFO L225 Difference]: With dead ends: 260 [2022-02-16 13:53:34,710 INFO L226 Difference]: Without dead ends: 258 [2022-02-16 13:53:34,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:34,710 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 79 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:34,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 89 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:34,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-16 13:53:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 244. [2022-02-16 13:53:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6296296296296298) internal successors, (639), 243 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 639 transitions. [2022-02-16 13:53:34,713 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 639 transitions. Word has length 20 [2022-02-16 13:53:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:34,713 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 639 transitions. [2022-02-16 13:53:34,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 639 transitions. [2022-02-16 13:53:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:34,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:34,713 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:34,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:34,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:34,927 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash 727958338, now seen corresponding path program 332 times [2022-02-16 13:53:34,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:34,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286318011] [2022-02-16 13:53:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:34,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:35,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:35,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286318011] [2022-02-16 13:53:35,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286318011] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:35,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533534759] [2022-02-16 13:53:35,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:53:35,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:35,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:35,006 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:35,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-02-16 13:53:35,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:35,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:35,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:35,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:53:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:35,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:35,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:35,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:53:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:35,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533534759] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:35,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:35,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:35,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454280062] [2022-02-16 13:53:35,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:35,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:35,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:35,522 INFO L87 Difference]: Start difference. First operand 244 states and 639 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:35,684 INFO L93 Difference]: Finished difference Result 247 states and 648 transitions. [2022-02-16 13:53:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:35,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:35,684 INFO L225 Difference]: With dead ends: 247 [2022-02-16 13:53:35,684 INFO L226 Difference]: Without dead ends: 247 [2022-02-16 13:53:35,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:53:35,685 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:35,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 73 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-16 13:53:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 240. [2022-02-16 13:53:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6359832635983262) internal successors, (630), 239 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 630 transitions. [2022-02-16 13:53:35,687 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 630 transitions. Word has length 20 [2022-02-16 13:53:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:35,687 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 630 transitions. [2022-02-16 13:53:35,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 630 transitions. [2022-02-16 13:53:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:35,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:35,688 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:35,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:35,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-02-16 13:53:35,904 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1654596636, now seen corresponding path program 333 times [2022-02-16 13:53:35,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:35,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324611894] [2022-02-16 13:53:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:35,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:35,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:35,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324611894] [2022-02-16 13:53:35,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324611894] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:35,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057025852] [2022-02-16 13:53:35,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:53:35,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:35,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:35,963 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:35,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-02-16 13:53:36,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:53:36,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:36,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:36,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:36,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:36,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:36,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057025852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:36,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:36,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:53:36,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713871810] [2022-02-16 13:53:36,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:36,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:53:36,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:36,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:53:36,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:53:36,471 INFO L87 Difference]: Start difference. First operand 240 states and 630 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:36,632 INFO L93 Difference]: Finished difference Result 262 states and 666 transitions. [2022-02-16 13:53:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:36,632 INFO L225 Difference]: With dead ends: 262 [2022-02-16 13:53:36,632 INFO L226 Difference]: Without dead ends: 260 [2022-02-16 13:53:36,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:53:36,633 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:36,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 76 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-16 13:53:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245. [2022-02-16 13:53:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6311475409836067) internal successors, (642), 244 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 642 transitions. [2022-02-16 13:53:36,636 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 642 transitions. Word has length 20 [2022-02-16 13:53:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:36,636 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 642 transitions. [2022-02-16 13:53:36,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 642 transitions. [2022-02-16 13:53:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:36,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:36,637 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:36,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:36,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-02-16 13:53:36,854 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash -539498840, now seen corresponding path program 334 times [2022-02-16 13:53:36,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:36,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632214609] [2022-02-16 13:53:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:36,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:36,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:36,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632214609] [2022-02-16 13:53:36,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632214609] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:36,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944331304] [2022-02-16 13:53:36,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:53:36,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:36,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:36,962 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:36,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-02-16 13:53:37,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:53:37,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:37,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:37,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:37,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:37,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:37,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:37,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:37,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944331304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:37,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:37,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:37,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884968037] [2022-02-16 13:53:37,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:37,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:37,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:37,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:37,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:37,590 INFO L87 Difference]: Start difference. First operand 245 states and 642 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:37,846 INFO L93 Difference]: Finished difference Result 262 states and 668 transitions. [2022-02-16 13:53:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:53:37,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:37,847 INFO L225 Difference]: With dead ends: 262 [2022-02-16 13:53:37,847 INFO L226 Difference]: Without dead ends: 262 [2022-02-16 13:53:37,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:53:37,848 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:37,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 112 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-16 13:53:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 244. [2022-02-16 13:53:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.633744855967078) internal successors, (640), 243 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:37,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 640 transitions. [2022-02-16 13:53:37,850 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 640 transitions. Word has length 20 [2022-02-16 13:53:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:37,850 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 640 transitions. [2022-02-16 13:53:37,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 640 transitions. [2022-02-16 13:53:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:37,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:37,851 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:37,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:38,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2022-02-16 13:53:38,059 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:38,059 INFO L85 PathProgramCache]: Analyzing trace with hash 943636098, now seen corresponding path program 335 times [2022-02-16 13:53:38,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:38,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786882121] [2022-02-16 13:53:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:38,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:38,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:38,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786882121] [2022-02-16 13:53:38,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786882121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:38,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326701290] [2022-02-16 13:53:38,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:53:38,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:38,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:38,133 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:38,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-02-16 13:53:38,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:53:38,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:38,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:38,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:38,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:38,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:53:38,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:53:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:38,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326701290] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:38,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:38,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:53:38,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349707705] [2022-02-16 13:53:38,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:38,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:53:38,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:38,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:53:38,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:53:38,566 INFO L87 Difference]: Start difference. First operand 244 states and 640 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:38,734 INFO L93 Difference]: Finished difference Result 250 states and 654 transitions. [2022-02-16 13:53:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:38,734 INFO L225 Difference]: With dead ends: 250 [2022-02-16 13:53:38,734 INFO L226 Difference]: Without dead ends: 250 [2022-02-16 13:53:38,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:53:38,735 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:38,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 53 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-16 13:53:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2022-02-16 13:53:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.632911392405063) internal successors, (624), 237 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 624 transitions. [2022-02-16 13:53:38,737 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 624 transitions. Word has length 20 [2022-02-16 13:53:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:38,737 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 624 transitions. [2022-02-16 13:53:38,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 624 transitions. [2022-02-16 13:53:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:38,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:38,738 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:38,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:38,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-02-16 13:53:38,938 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1015227774, now seen corresponding path program 336 times [2022-02-16 13:53:38,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:38,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555498974] [2022-02-16 13:53:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:38,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:39,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:39,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555498974] [2022-02-16 13:53:39,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555498974] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:39,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366534382] [2022-02-16 13:53:39,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:53:39,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:39,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:39,036 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:39,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-02-16 13:53:39,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:53:39,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:39,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:39,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:39,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:39,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:39,597 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:39,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:39,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366534382] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:39,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:39,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:53:39,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603275473] [2022-02-16 13:53:39,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:39,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:53:39,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:53:39,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:53:39,604 INFO L87 Difference]: Start difference. First operand 238 states and 624 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:39,858 INFO L93 Difference]: Finished difference Result 325 states and 786 transitions. [2022-02-16 13:53:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:39,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:39,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:39,859 INFO L225 Difference]: With dead ends: 325 [2022-02-16 13:53:39,859 INFO L226 Difference]: Without dead ends: 325 [2022-02-16 13:53:39,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:53:39,859 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:39,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 102 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-16 13:53:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 243. [2022-02-16 13:53:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.628099173553719) internal successors, (636), 242 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 636 transitions. [2022-02-16 13:53:39,862 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 636 transitions. Word has length 20 [2022-02-16 13:53:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:39,862 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 636 transitions. [2022-02-16 13:53:39,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 636 transitions. [2022-02-16 13:53:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:39,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:39,862 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:39,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:40,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:40,071 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash 180498626, now seen corresponding path program 337 times [2022-02-16 13:53:40,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:40,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702382148] [2022-02-16 13:53:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:40,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:40,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:40,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702382148] [2022-02-16 13:53:40,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702382148] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:40,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226471302] [2022-02-16 13:53:40,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:53:40,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:40,161 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:40,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-02-16 13:53:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:40,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:40,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:40,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:40,726 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:40,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:40,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226471302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:40,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:40,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:40,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762225901] [2022-02-16 13:53:40,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:40,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:40,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:40,744 INFO L87 Difference]: Start difference. First operand 243 states and 636 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:41,059 INFO L93 Difference]: Finished difference Result 340 states and 807 transitions. [2022-02-16 13:53:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:41,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:41,059 INFO L225 Difference]: With dead ends: 340 [2022-02-16 13:53:41,059 INFO L226 Difference]: Without dead ends: 340 [2022-02-16 13:53:41,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:41,060 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 225 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:41,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 123 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-16 13:53:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 245. [2022-02-16 13:53:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6352459016393444) internal successors, (643), 244 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 643 transitions. [2022-02-16 13:53:41,063 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 643 transitions. Word has length 20 [2022-02-16 13:53:41,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:41,063 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 643 transitions. [2022-02-16 13:53:41,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 643 transitions. [2022-02-16 13:53:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:41,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:41,063 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:41,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:41,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-02-16 13:53:41,279 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:41,280 INFO L85 PathProgramCache]: Analyzing trace with hash 895031482, now seen corresponding path program 338 times [2022-02-16 13:53:41,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:41,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990069770] [2022-02-16 13:53:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:41,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:41,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:41,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990069770] [2022-02-16 13:53:41,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990069770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:41,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283369261] [2022-02-16 13:53:41,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:53:41,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:41,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:41,336 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:41,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-02-16 13:53:41,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:41,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:41,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:41,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:41,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:41,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:41,837 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:41,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:41,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283369261] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:41,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:41,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:53:41,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251148393] [2022-02-16 13:53:41,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:41,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:53:41,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:53:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:53:41,842 INFO L87 Difference]: Start difference. First operand 245 states and 643 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:42,038 INFO L93 Difference]: Finished difference Result 325 states and 786 transitions. [2022-02-16 13:53:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:42,039 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:42,039 INFO L225 Difference]: With dead ends: 325 [2022-02-16 13:53:42,039 INFO L226 Difference]: Without dead ends: 324 [2022-02-16 13:53:42,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:53:42,039 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:42,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 146 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-16 13:53:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 239. [2022-02-16 13:53:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.642857142857143) internal successors, (629), 238 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 629 transitions. [2022-02-16 13:53:42,042 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 629 transitions. Word has length 20 [2022-02-16 13:53:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:42,042 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 629 transitions. [2022-02-16 13:53:42,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:42,042 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 629 transitions. [2022-02-16 13:53:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:42,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:42,043 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:42,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:42,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:42,259 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:42,259 INFO L85 PathProgramCache]: Analyzing trace with hash 296484283, now seen corresponding path program 339 times [2022-02-16 13:53:42,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:42,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089232756] [2022-02-16 13:53:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:42,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:42,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:42,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089232756] [2022-02-16 13:53:42,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089232756] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:42,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328793095] [2022-02-16 13:53:42,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:53:42,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:42,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:42,310 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:42,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-02-16 13:53:42,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:53:42,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:42,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:42,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:53:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:42,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:42,844 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:42,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-02-16 13:53:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:42,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328793095] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:42,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:42,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-16 13:53:42,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593792484] [2022-02-16 13:53:42,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:42,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:53:42,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:53:42,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:53:42,862 INFO L87 Difference]: Start difference. First operand 239 states and 629 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:43,270 INFO L93 Difference]: Finished difference Result 329 states and 775 transitions. [2022-02-16 13:53:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:53:43,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:43,270 INFO L225 Difference]: With dead ends: 329 [2022-02-16 13:53:43,270 INFO L226 Difference]: Without dead ends: 302 [2022-02-16 13:53:43,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:43,271 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 185 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:43,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 124 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:43,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-16 13:53:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 235. [2022-02-16 13:53:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.5982905982905984) internal successors, (608), 234 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 608 transitions. [2022-02-16 13:53:43,273 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 608 transitions. Word has length 20 [2022-02-16 13:53:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:43,273 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 608 transitions. [2022-02-16 13:53:43,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 608 transitions. [2022-02-16 13:53:43,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:43,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:43,274 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:43,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-02-16 13:53:43,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:43,490 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1117614270, now seen corresponding path program 340 times [2022-02-16 13:53:43,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:43,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492375026] [2022-02-16 13:53:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:43,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:43,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:43,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492375026] [2022-02-16 13:53:43,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492375026] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:43,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037315166] [2022-02-16 13:53:43,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:53:43,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:43,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:43,574 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:43,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-02-16 13:53:43,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:53:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:43,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:43,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:44,039 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:44,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:44,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037315166] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:44,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:44,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:44,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109758069] [2022-02-16 13:53:44,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:44,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:44,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:44,043 INFO L87 Difference]: Start difference. First operand 235 states and 608 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:44,250 INFO L93 Difference]: Finished difference Result 369 states and 861 transitions. [2022-02-16 13:53:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:44,250 INFO L225 Difference]: With dead ends: 369 [2022-02-16 13:53:44,250 INFO L226 Difference]: Without dead ends: 369 [2022-02-16 13:53:44,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:44,251 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 140 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:44,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 154 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-02-16 13:53:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 236. [2022-02-16 13:53:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.608510638297872) internal successors, (613), 235 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 613 transitions. [2022-02-16 13:53:44,254 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 613 transitions. Word has length 20 [2022-02-16 13:53:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:44,254 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 613 transitions. [2022-02-16 13:53:44,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 613 transitions. [2022-02-16 13:53:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:44,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:44,254 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:44,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:44,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:44,471 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1627390722, now seen corresponding path program 341 times [2022-02-16 13:53:44,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:44,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113228475] [2022-02-16 13:53:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:44,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:44,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:44,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113228475] [2022-02-16 13:53:44,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113228475] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:44,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828819691] [2022-02-16 13:53:44,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:53:44,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:44,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:44,539 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:44,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-02-16 13:53:44,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:44,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:44,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:44,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:44,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:44,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:45,120 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:45,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:45,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828819691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:45,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:45,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:45,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804376297] [2022-02-16 13:53:45,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:45,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:45,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:45,125 INFO L87 Difference]: Start difference. First operand 236 states and 613 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:45,348 INFO L93 Difference]: Finished difference Result 373 states and 873 transitions. [2022-02-16 13:53:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:45,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:45,349 INFO L225 Difference]: With dead ends: 373 [2022-02-16 13:53:45,349 INFO L226 Difference]: Without dead ends: 373 [2022-02-16 13:53:45,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:45,349 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 150 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:45,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 153 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-02-16 13:53:45,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 240. [2022-02-16 13:53:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6192468619246863) internal successors, (626), 239 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2022-02-16 13:53:45,352 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 20 [2022-02-16 13:53:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:45,352 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2022-02-16 13:53:45,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2022-02-16 13:53:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:45,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:45,352 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:45,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:45,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-02-16 13:53:45,567 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1822823550, now seen corresponding path program 342 times [2022-02-16 13:53:45,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:45,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795187889] [2022-02-16 13:53:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:45,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:45,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:45,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795187889] [2022-02-16 13:53:45,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795187889] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:45,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512970168] [2022-02-16 13:53:45,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:53:45,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:45,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:45,639 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:45,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-02-16 13:53:45,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:53:45,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:45,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:45,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:45,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:46,050 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:46,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:46,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512970168] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:46,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:46,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:46,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271798133] [2022-02-16 13:53:46,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:46,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:46,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:46,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:46,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:46,054 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:46,227 INFO L93 Difference]: Finished difference Result 358 states and 853 transitions. [2022-02-16 13:53:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:46,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:46,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:46,228 INFO L225 Difference]: With dead ends: 358 [2022-02-16 13:53:46,228 INFO L226 Difference]: Without dead ends: 358 [2022-02-16 13:53:46,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:46,228 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 153 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:46,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 133 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-16 13:53:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 235. [2022-02-16 13:53:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.5982905982905984) internal successors, (608), 234 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 608 transitions. [2022-02-16 13:53:46,231 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 608 transitions. Word has length 20 [2022-02-16 13:53:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:46,231 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 608 transitions. [2022-02-16 13:53:46,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 608 transitions. [2022-02-16 13:53:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:46,232 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:46,232 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:46,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:46,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-02-16 13:53:46,447 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1736665658, now seen corresponding path program 343 times [2022-02-16 13:53:46,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:46,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578167446] [2022-02-16 13:53:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:46,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:46,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:46,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578167446] [2022-02-16 13:53:46,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578167446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:46,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257231018] [2022-02-16 13:53:46,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:53:46,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:46,519 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:46,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-02-16 13:53:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:46,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:46,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:47,095 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:47,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:47,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257231018] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:47,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:47,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:47,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221608805] [2022-02-16 13:53:47,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:47,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:47,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:47,099 INFO L87 Difference]: Start difference. First operand 235 states and 608 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:47,368 INFO L93 Difference]: Finished difference Result 409 states and 914 transitions. [2022-02-16 13:53:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:47,368 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:47,369 INFO L225 Difference]: With dead ends: 409 [2022-02-16 13:53:47,369 INFO L226 Difference]: Without dead ends: 409 [2022-02-16 13:53:47,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:53:47,369 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 253 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:47,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 140 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:47,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-16 13:53:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 241. [2022-02-16 13:53:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.620833333333333) internal successors, (629), 240 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 629 transitions. [2022-02-16 13:53:47,372 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 629 transitions. Word has length 20 [2022-02-16 13:53:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:47,372 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 629 transitions. [2022-02-16 13:53:47,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 629 transitions. [2022-02-16 13:53:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:47,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:47,373 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:47,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:47,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-02-16 13:53:47,579 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:47,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1022132802, now seen corresponding path program 344 times [2022-02-16 13:53:47,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:47,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187187683] [2022-02-16 13:53:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:47,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:47,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:47,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187187683] [2022-02-16 13:53:47,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187187683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:47,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730213033] [2022-02-16 13:53:47,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:53:47,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:47,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:47,650 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:47,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-02-16 13:53:47,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:47,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:47,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:47,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:48,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:48,242 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:48,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:48,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730213033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:48,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:48,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:48,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901206011] [2022-02-16 13:53:48,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:48,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:48,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:48,246 INFO L87 Difference]: Start difference. First operand 241 states and 629 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:48,478 INFO L93 Difference]: Finished difference Result 385 states and 884 transitions. [2022-02-16 13:53:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:48,478 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:48,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:48,479 INFO L225 Difference]: With dead ends: 385 [2022-02-16 13:53:48,479 INFO L226 Difference]: Without dead ends: 384 [2022-02-16 13:53:48,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:48,479 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:48,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 122 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-02-16 13:53:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 238. [2022-02-16 13:53:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6202531645569622) internal successors, (621), 237 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 621 transitions. [2022-02-16 13:53:48,482 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 621 transitions. Word has length 20 [2022-02-16 13:53:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:48,482 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 621 transitions. [2022-02-16 13:53:48,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 621 transitions. [2022-02-16 13:53:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:48,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:48,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:48,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:48,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-02-16 13:53:48,695 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:48,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1528372350, now seen corresponding path program 345 times [2022-02-16 13:53:48,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:48,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740334596] [2022-02-16 13:53:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:48,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:48,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:48,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740334596] [2022-02-16 13:53:48,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740334596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:48,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779293753] [2022-02-16 13:53:48,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:53:48,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:48,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:48,795 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:48,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-02-16 13:53:49,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:53:49,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:49,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:49,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:49,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:49,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:49,421 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:49,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:49,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779293753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:49,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:49,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:49,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006654901] [2022-02-16 13:53:49,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:49,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:49,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:49,426 INFO L87 Difference]: Start difference. First operand 238 states and 621 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:49,705 INFO L93 Difference]: Finished difference Result 406 states and 929 transitions. [2022-02-16 13:53:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:49,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:49,706 INFO L225 Difference]: With dead ends: 406 [2022-02-16 13:53:49,706 INFO L226 Difference]: Without dead ends: 406 [2022-02-16 13:53:49,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:49,706 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 228 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:49,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 145 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-02-16 13:53:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 240. [2022-02-16 13:53:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6359832635983262) internal successors, (630), 239 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 630 transitions. [2022-02-16 13:53:49,709 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 630 transitions. Word has length 20 [2022-02-16 13:53:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:49,709 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 630 transitions. [2022-02-16 13:53:49,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 630 transitions. [2022-02-16 13:53:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:49,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:49,710 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:49,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:49,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:49,923 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:49,923 INFO L85 PathProgramCache]: Analyzing trace with hash -838650426, now seen corresponding path program 346 times [2022-02-16 13:53:49,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:49,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731958643] [2022-02-16 13:53:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:49,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:50,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:50,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731958643] [2022-02-16 13:53:50,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731958643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:50,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893771923] [2022-02-16 13:53:50,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:53:50,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:50,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:50,030 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:50,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-02-16 13:53:50,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:53:50,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:50,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:50,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:50,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:50,601 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:50,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:50,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893771923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:50,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:50,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:50,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941510911] [2022-02-16 13:53:50,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:50,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:50,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:50,605 INFO L87 Difference]: Start difference. First operand 240 states and 630 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:50,800 INFO L93 Difference]: Finished difference Result 392 states and 914 transitions. [2022-02-16 13:53:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:50,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:50,800 INFO L225 Difference]: With dead ends: 392 [2022-02-16 13:53:50,800 INFO L226 Difference]: Without dead ends: 392 [2022-02-16 13:53:50,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:53:50,801 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 159 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:50,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 142 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-16 13:53:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 238. [2022-02-16 13:53:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6202531645569622) internal successors, (621), 237 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 621 transitions. [2022-02-16 13:53:50,804 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 621 transitions. Word has length 20 [2022-02-16 13:53:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:50,804 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 621 transitions. [2022-02-16 13:53:50,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 621 transitions. [2022-02-16 13:53:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:50,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:50,804 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:50,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:51,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2022-02-16 13:53:51,010 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:51,010 INFO L85 PathProgramCache]: Analyzing trace with hash 814141626, now seen corresponding path program 347 times [2022-02-16 13:53:51,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:51,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607708806] [2022-02-16 13:53:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:51,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:51,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:51,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607708806] [2022-02-16 13:53:51,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607708806] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:51,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634302281] [2022-02-16 13:53:51,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:53:51,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:51,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:51,110 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:51,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-02-16 13:53:51,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:53:51,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:51,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:51,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:51,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:51,634 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:51,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:51,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634302281] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:51,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:51,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:51,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068070581] [2022-02-16 13:53:51,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:51,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:51,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:51,638 INFO L87 Difference]: Start difference. First operand 238 states and 621 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:51,797 INFO L93 Difference]: Finished difference Result 368 states and 859 transitions. [2022-02-16 13:53:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:51,798 INFO L225 Difference]: With dead ends: 368 [2022-02-16 13:53:51,798 INFO L226 Difference]: Without dead ends: 366 [2022-02-16 13:53:51,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:51,798 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 225 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:51,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 108 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:53:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-02-16 13:53:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 241. [2022-02-16 13:53:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.620833333333333) internal successors, (629), 240 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 629 transitions. [2022-02-16 13:53:51,801 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 629 transitions. Word has length 20 [2022-02-16 13:53:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:51,801 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 629 transitions. [2022-02-16 13:53:51,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 629 transitions. [2022-02-16 13:53:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:51,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:51,802 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:51,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:52,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-02-16 13:53:52,018 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1929239422, now seen corresponding path program 348 times [2022-02-16 13:53:52,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:52,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380268074] [2022-02-16 13:53:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:52,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:52,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:52,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380268074] [2022-02-16 13:53:52,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380268074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:52,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530674234] [2022-02-16 13:53:52,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:53:52,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:52,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:52,104 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:52,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-02-16 13:53:52,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:53:52,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:52,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:52,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:52,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:53:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:52,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:52,704 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:52,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:52,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530674234] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:52,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:52,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:52,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011364593] [2022-02-16 13:53:52,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:52,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:52,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:52,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:52,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:52,709 INFO L87 Difference]: Start difference. First operand 241 states and 629 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:53,019 INFO L93 Difference]: Finished difference Result 370 states and 865 transitions. [2022-02-16 13:53:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:53:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:53,020 INFO L225 Difference]: With dead ends: 370 [2022-02-16 13:53:53,020 INFO L226 Difference]: Without dead ends: 370 [2022-02-16 13:53:53,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:53,020 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:53,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 189 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-16 13:53:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 241. [2022-02-16 13:53:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.620833333333333) internal successors, (629), 240 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 629 transitions. [2022-02-16 13:53:53,024 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 629 transitions. Word has length 20 [2022-02-16 13:53:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:53,024 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 629 transitions. [2022-02-16 13:53:53,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 629 transitions. [2022-02-16 13:53:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:53,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:53,024 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:53,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:53,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-02-16 13:53:53,235 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1754081124, now seen corresponding path program 349 times [2022-02-16 13:53:53,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:53,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503489439] [2022-02-16 13:53:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:53,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:53,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:53,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503489439] [2022-02-16 13:53:53,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503489439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:53,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443157376] [2022-02-16 13:53:53,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:53:53,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:53,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:53,331 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:53,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-02-16 13:53:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:53,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:53,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:53,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:53:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:53,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:53,847 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:53,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:53,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443157376] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:53,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:53,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:53:53,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417905644] [2022-02-16 13:53:53,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:53,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:53:53,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:53:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:53:53,854 INFO L87 Difference]: Start difference. First operand 241 states and 629 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:54,103 INFO L93 Difference]: Finished difference Result 340 states and 852 transitions. [2022-02-16 13:53:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:54,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:54,103 INFO L225 Difference]: With dead ends: 340 [2022-02-16 13:53:54,103 INFO L226 Difference]: Without dead ends: 340 [2022-02-16 13:53:54,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:53:54,104 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:54,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 122 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:54,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-16 13:53:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 245. [2022-02-16 13:53:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.639344262295082) internal successors, (644), 244 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 644 transitions. [2022-02-16 13:53:54,107 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 644 transitions. Word has length 20 [2022-02-16 13:53:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:54,107 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 644 transitions. [2022-02-16 13:53:54,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 644 transitions. [2022-02-16 13:53:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:54,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:54,107 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:54,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:54,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:54,324 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2031109720, now seen corresponding path program 350 times [2022-02-16 13:53:54,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:54,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404502776] [2022-02-16 13:53:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:54,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:54,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:54,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404502776] [2022-02-16 13:53:54,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404502776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:54,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448498210] [2022-02-16 13:53:54,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:53:54,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:54,413 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:54,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-02-16 13:53:54,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:54,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:54,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:54,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:54,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:53:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:54,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:55,002 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:55,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:55,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448498210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:55,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:55,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:55,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658135182] [2022-02-16 13:53:55,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:55,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:55,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:55,008 INFO L87 Difference]: Start difference. First operand 245 states and 644 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:55,296 INFO L93 Difference]: Finished difference Result 353 states and 867 transitions. [2022-02-16 13:53:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:55,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:55,297 INFO L225 Difference]: With dead ends: 353 [2022-02-16 13:53:55,297 INFO L226 Difference]: Without dead ends: 353 [2022-02-16 13:53:55,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:55,298 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:55,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 142 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-16 13:53:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 250. [2022-02-16 13:53:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.646586345381526) internal successors, (659), 249 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 659 transitions. [2022-02-16 13:53:55,301 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 659 transitions. Word has length 20 [2022-02-16 13:53:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:55,301 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 659 transitions. [2022-02-16 13:53:55,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 659 transitions. [2022-02-16 13:53:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:55,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:55,301 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:55,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:55,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:55,511 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:55,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:55,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1835676892, now seen corresponding path program 351 times [2022-02-16 13:53:55,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:55,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854420025] [2022-02-16 13:53:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:55,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:55,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:55,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854420025] [2022-02-16 13:53:55,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854420025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:55,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713470223] [2022-02-16 13:53:55,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:53:55,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:55,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:55,598 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:55,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-02-16 13:53:55,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:53:55,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:55,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:53:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:55,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:56,157 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:56,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:56,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713470223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:56,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:56,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:56,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693697122] [2022-02-16 13:53:56,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:56,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:56,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:56,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:56,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:56,162 INFO L87 Difference]: Start difference. First operand 250 states and 659 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:56,365 INFO L93 Difference]: Finished difference Result 332 states and 840 transitions. [2022-02-16 13:53:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:56,366 INFO L225 Difference]: With dead ends: 332 [2022-02-16 13:53:56,366 INFO L226 Difference]: Without dead ends: 332 [2022-02-16 13:53:56,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:56,366 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:56,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 110 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-16 13:53:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 245. [2022-02-16 13:53:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.627049180327869) internal successors, (641), 244 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 641 transitions. [2022-02-16 13:53:56,369 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 641 transitions. Word has length 20 [2022-02-16 13:53:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:56,369 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 641 transitions. [2022-02-16 13:53:56,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 641 transitions. [2022-02-16 13:53:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:56,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:56,369 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:56,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:56,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:56,586 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:56,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:56,586 INFO L85 PathProgramCache]: Analyzing trace with hash 173277254, now seen corresponding path program 352 times [2022-02-16 13:53:56,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:56,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162772123] [2022-02-16 13:53:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:56,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:56,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:56,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162772123] [2022-02-16 13:53:56,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162772123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:56,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736826871] [2022-02-16 13:53:56,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:53:56,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:56,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:56,672 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:56,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-02-16 13:53:56,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:53:56,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:56,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:57,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:53:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:57,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:57,292 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:57,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:57,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736826871] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:57,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:57,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:57,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871510218] [2022-02-16 13:53:57,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:57,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:57,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:57,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:57,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:57,298 INFO L87 Difference]: Start difference. First operand 245 states and 641 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:57,679 INFO L93 Difference]: Finished difference Result 317 states and 785 transitions. [2022-02-16 13:53:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:53:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:57,680 INFO L225 Difference]: With dead ends: 317 [2022-02-16 13:53:57,680 INFO L226 Difference]: Without dead ends: 317 [2022-02-16 13:53:57,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:53:57,680 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 133 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:57,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 169 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-16 13:53:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 252. [2022-02-16 13:53:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.637450199203187) internal successors, (662), 251 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 662 transitions. [2022-02-16 13:53:57,683 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 662 transitions. Word has length 20 [2022-02-16 13:53:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:57,683 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 662 transitions. [2022-02-16 13:53:57,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 662 transitions. [2022-02-16 13:53:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:57,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:57,684 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:57,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-02-16 13:53:57,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-02-16 13:53:57,891 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash 175903030, now seen corresponding path program 353 times [2022-02-16 13:53:57,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:57,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310252401] [2022-02-16 13:53:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:57,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:57,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:57,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310252401] [2022-02-16 13:53:57,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310252401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:57,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309516453] [2022-02-16 13:53:57,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:53:57,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:57,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:57,956 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:57,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-02-16 13:53:58,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:53:58,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:58,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:58,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:58,507 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:58,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:58,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309516453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:58,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:58,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:58,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264624814] [2022-02-16 13:53:58,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:58,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:58,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:58,512 INFO L87 Difference]: Start difference. First operand 252 states and 662 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:58,756 INFO L93 Difference]: Finished difference Result 282 states and 734 transitions. [2022-02-16 13:53:58,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:58,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:58,757 INFO L225 Difference]: With dead ends: 282 [2022-02-16 13:53:58,757 INFO L226 Difference]: Without dead ends: 282 [2022-02-16 13:53:58,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:58,757 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:58,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 108 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-16 13:53:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 250. [2022-02-16 13:53:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.646586345381526) internal successors, (659), 249 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 659 transitions. [2022-02-16 13:53:58,760 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 659 transitions. Word has length 20 [2022-02-16 13:53:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:58,760 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 659 transitions. [2022-02-16 13:53:58,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 659 transitions. [2022-02-16 13:53:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:58,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:58,760 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:58,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-02-16 13:53:58,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-02-16 13:53:58,970 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:53:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:53:58,971 INFO L85 PathProgramCache]: Analyzing trace with hash 862670914, now seen corresponding path program 354 times [2022-02-16 13:53:58,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:53:58,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766355091] [2022-02-16 13:53:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:53:58,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:53:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:53:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:59,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:53:59,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766355091] [2022-02-16 13:53:59,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766355091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:53:59,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506752761] [2022-02-16 13:53:59,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:53:59,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:53:59,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:53:59,044 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:53:59,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-02-16 13:53:59,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:53:59,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:53:59,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:53:59,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:53:59,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:53:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:59,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:53:59,685 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:53:59,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:53:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:53:59,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506752761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:53:59,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:53:59,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:53:59,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425931910] [2022-02-16 13:53:59,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:53:59,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:53:59,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:53:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:53:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:53:59,690 INFO L87 Difference]: Start difference. First operand 250 states and 659 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:53:59,958 INFO L93 Difference]: Finished difference Result 293 states and 754 transitions. [2022-02-16 13:53:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:53:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:53:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:53:59,959 INFO L225 Difference]: With dead ends: 293 [2022-02-16 13:53:59,959 INFO L226 Difference]: Without dead ends: 293 [2022-02-16 13:53:59,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:53:59,959 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:53:59,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 144 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:53:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-16 13:53:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 241. [2022-02-16 13:53:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.620833333333333) internal successors, (629), 240 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 629 transitions. [2022-02-16 13:53:59,962 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 629 transitions. Word has length 20 [2022-02-16 13:53:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:53:59,962 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 629 transitions. [2022-02-16 13:53:59,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:53:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 629 transitions. [2022-02-16 13:53:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:53:59,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:53:59,962 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:53:59,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-02-16 13:54:00,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-02-16 13:54:00,179 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1285367930, now seen corresponding path program 355 times [2022-02-16 13:54:00,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:00,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974155119] [2022-02-16 13:54:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:00,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:00,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:00,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974155119] [2022-02-16 13:54:00,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974155119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:00,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782549325] [2022-02-16 13:54:00,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:00,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:00,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:00,336 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:00,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-02-16 13:54:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:00,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:00,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:00,960 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:00,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:00,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782549325] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:00,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:00,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:00,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022645235] [2022-02-16 13:54:00,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:00,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:00,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:00,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:00,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:00,965 INFO L87 Difference]: Start difference. First operand 241 states and 629 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:01,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:01,270 INFO L93 Difference]: Finished difference Result 364 states and 859 transitions. [2022-02-16 13:54:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:01,271 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:01,271 INFO L225 Difference]: With dead ends: 364 [2022-02-16 13:54:01,271 INFO L226 Difference]: Without dead ends: 364 [2022-02-16 13:54:01,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:54:01,271 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 211 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:01,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 155 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:01,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-16 13:54:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 249. [2022-02-16 13:54:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.661290322580645) internal successors, (660), 248 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 660 transitions. [2022-02-16 13:54:01,275 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 660 transitions. Word has length 20 [2022-02-16 13:54:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:01,275 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 660 transitions. [2022-02-16 13:54:01,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 660 transitions. [2022-02-16 13:54:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:01,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:01,275 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:01,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:01,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-02-16 13:54:01,492 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1999900786, now seen corresponding path program 356 times [2022-02-16 13:54:01,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:01,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875515623] [2022-02-16 13:54:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:01,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:01,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:01,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875515623] [2022-02-16 13:54:01,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875515623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:01,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243457045] [2022-02-16 13:54:01,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:01,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:01,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:01,551 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:01,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-02-16 13:54:01,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:01,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:01,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:01,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:01,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:01,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:02,027 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:02,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:02,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243457045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:02,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:02,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:02,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795304402] [2022-02-16 13:54:02,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:02,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:02,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:02,031 INFO L87 Difference]: Start difference. First operand 249 states and 660 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:02,217 INFO L93 Difference]: Finished difference Result 340 states and 829 transitions. [2022-02-16 13:54:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:02,217 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:02,218 INFO L225 Difference]: With dead ends: 340 [2022-02-16 13:54:02,218 INFO L226 Difference]: Without dead ends: 339 [2022-02-16 13:54:02,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:54:02,218 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:02,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 122 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:54:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-16 13:54:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 245. [2022-02-16 13:54:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.668032786885246) internal successors, (651), 244 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 651 transitions. [2022-02-16 13:54:02,221 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 651 transitions. Word has length 20 [2022-02-16 13:54:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:02,221 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 651 transitions. [2022-02-16 13:54:02,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 651 transitions. [2022-02-16 13:54:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:02,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:02,221 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:02,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:02,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2022-02-16 13:54:02,430 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1493661238, now seen corresponding path program 357 times [2022-02-16 13:54:02,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:02,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757086480] [2022-02-16 13:54:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:02,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:02,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:02,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757086480] [2022-02-16 13:54:02,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757086480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:02,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989128402] [2022-02-16 13:54:02,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:54:02,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:02,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:02,505 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:02,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-02-16 13:54:02,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:54:02,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:02,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:02,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:02,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:03,030 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:03,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:03,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989128402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:03,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:03,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:03,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442997180] [2022-02-16 13:54:03,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:03,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:03,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:03,040 INFO L87 Difference]: Start difference. First operand 245 states and 651 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:03,345 INFO L93 Difference]: Finished difference Result 377 states and 896 transitions. [2022-02-16 13:54:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:03,346 INFO L225 Difference]: With dead ends: 377 [2022-02-16 13:54:03,346 INFO L226 Difference]: Without dead ends: 377 [2022-02-16 13:54:03,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:54:03,346 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:03,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 168 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-16 13:54:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 247. [2022-02-16 13:54:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.682926829268293) internal successors, (660), 246 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 660 transitions. [2022-02-16 13:54:03,349 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 660 transitions. Word has length 20 [2022-02-16 13:54:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:03,349 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 660 transitions. [2022-02-16 13:54:03,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 660 transitions. [2022-02-16 13:54:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:03,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:03,350 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:03,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:03,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:03,566 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:03,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2111584134, now seen corresponding path program 358 times [2022-02-16 13:54:03,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:03,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946178312] [2022-02-16 13:54:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:03,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:03,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:03,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946178312] [2022-02-16 13:54:03,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946178312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:03,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572608386] [2022-02-16 13:54:03,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:54:03,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:03,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:03,637 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:03,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-02-16 13:54:03,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:54:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:03,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:04,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:04,182 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:04,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:04,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572608386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:04,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:04,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:04,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456245344] [2022-02-16 13:54:04,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:04,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:04,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:04,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:04,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:04,186 INFO L87 Difference]: Start difference. First operand 247 states and 660 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:04,461 INFO L93 Difference]: Finished difference Result 363 states and 881 transitions. [2022-02-16 13:54:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:04,462 INFO L225 Difference]: With dead ends: 363 [2022-02-16 13:54:04,462 INFO L226 Difference]: Without dead ends: 363 [2022-02-16 13:54:04,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:54:04,462 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 137 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:04,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 152 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-02-16 13:54:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 245. [2022-02-16 13:54:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.668032786885246) internal successors, (651), 244 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 651 transitions. [2022-02-16 13:54:04,465 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 651 transitions. Word has length 20 [2022-02-16 13:54:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:04,465 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 651 transitions. [2022-02-16 13:54:04,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 651 transitions. [2022-02-16 13:54:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:04,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:04,465 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:04,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:04,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:04,682 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash -458792082, now seen corresponding path program 359 times [2022-02-16 13:54:04,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:04,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575333153] [2022-02-16 13:54:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:04,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:04,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:04,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575333153] [2022-02-16 13:54:04,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575333153] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:04,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487083475] [2022-02-16 13:54:04,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:54:04,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:04,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:04,749 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:04,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-02-16 13:54:04,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:54:04,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:04,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:04,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:05,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:05,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:05,390 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:05,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:05,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487083475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:05,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:05,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:05,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120988992] [2022-02-16 13:54:05,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:05,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:05,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:05,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:05,397 INFO L87 Difference]: Start difference. First operand 245 states and 651 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:05,765 INFO L93 Difference]: Finished difference Result 362 states and 859 transitions. [2022-02-16 13:54:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:05,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:05,766 INFO L225 Difference]: With dead ends: 362 [2022-02-16 13:54:05,766 INFO L226 Difference]: Without dead ends: 360 [2022-02-16 13:54:05,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:54:05,766 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 185 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:05,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 133 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-16 13:54:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 247. [2022-02-16 13:54:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6747967479674797) internal successors, (658), 246 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 658 transitions. [2022-02-16 13:54:05,769 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 658 transitions. Word has length 20 [2022-02-16 13:54:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:05,770 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 658 transitions. [2022-02-16 13:54:05,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 658 transitions. [2022-02-16 13:54:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:05,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:05,770 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:05,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:05,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:05,979 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:05,979 INFO L85 PathProgramCache]: Analyzing trace with hash 656305714, now seen corresponding path program 360 times [2022-02-16 13:54:05,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:05,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076417496] [2022-02-16 13:54:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:05,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:06,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:06,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076417496] [2022-02-16 13:54:06,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076417496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:06,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603366694] [2022-02-16 13:54:06,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:54:06,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:06,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:06,091 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:06,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-02-16 13:54:06,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:54:06,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:06,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:06,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:06,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:06,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:06,729 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:06,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:06,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603366694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:06,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:06,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:06,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159050622] [2022-02-16 13:54:06,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:06,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:06,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:06,736 INFO L87 Difference]: Start difference. First operand 247 states and 658 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:07,223 INFO L93 Difference]: Finished difference Result 364 states and 865 transitions. [2022-02-16 13:54:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:54:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:07,224 INFO L225 Difference]: With dead ends: 364 [2022-02-16 13:54:07,224 INFO L226 Difference]: Without dead ends: 364 [2022-02-16 13:54:07,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:54:07,224 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 114 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:07,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 202 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:54:07,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-16 13:54:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 243. [2022-02-16 13:54:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6404958677685952) internal successors, (639), 242 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:07,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 639 transitions. [2022-02-16 13:54:07,227 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 639 transitions. Word has length 20 [2022-02-16 13:54:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:07,227 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 639 transitions. [2022-02-16 13:54:07,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:07,228 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 639 transitions. [2022-02-16 13:54:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:07,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:07,228 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:07,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:07,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:07,431 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:07,431 INFO L85 PathProgramCache]: Analyzing trace with hash 226204060, now seen corresponding path program 361 times [2022-02-16 13:54:07,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:07,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011226065] [2022-02-16 13:54:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:07,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:07,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:07,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011226065] [2022-02-16 13:54:07,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011226065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:07,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093675620] [2022-02-16 13:54:07,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:07,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:07,543 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:07,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-02-16 13:54:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:07,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:07,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:07,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:08,084 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:08,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:08,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093675620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:08,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:08,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:08,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206631149] [2022-02-16 13:54:08,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:08,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:08,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:08,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:08,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:08,088 INFO L87 Difference]: Start difference. First operand 243 states and 639 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:08,308 INFO L93 Difference]: Finished difference Result 326 states and 812 transitions. [2022-02-16 13:54:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:08,309 INFO L225 Difference]: With dead ends: 326 [2022-02-16 13:54:08,309 INFO L226 Difference]: Without dead ends: 326 [2022-02-16 13:54:08,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:54:08,309 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:08,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 130 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:54:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-16 13:54:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 247. [2022-02-16 13:54:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.66260162601626) internal successors, (655), 246 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 655 transitions. [2022-02-16 13:54:08,312 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 655 transitions. Word has length 20 [2022-02-16 13:54:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:08,312 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 655 transitions. [2022-02-16 13:54:08,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 655 transitions. [2022-02-16 13:54:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:08,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:08,312 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:08,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:08,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:08,529 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash 915925984, now seen corresponding path program 362 times [2022-02-16 13:54:08,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:08,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992955166] [2022-02-16 13:54:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:08,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:08,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:08,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992955166] [2022-02-16 13:54:08,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992955166] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:08,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546090832] [2022-02-16 13:54:08,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:08,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:08,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:08,630 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:08,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-02-16 13:54:08,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:08,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:08,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:08,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:09,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:09,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:09,277 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:09,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:09,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546090832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:09,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:09,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:09,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209288933] [2022-02-16 13:54:09,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:09,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:09,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:09,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:09,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:09,282 INFO L87 Difference]: Start difference. First operand 247 states and 655 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:09,665 INFO L93 Difference]: Finished difference Result 324 states and 809 transitions. [2022-02-16 13:54:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:54:09,665 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:09,666 INFO L225 Difference]: With dead ends: 324 [2022-02-16 13:54:09,666 INFO L226 Difference]: Without dead ends: 324 [2022-02-16 13:54:09,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:54:09,666 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:09,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 171 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:54:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-16 13:54:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 245. [2022-02-16 13:54:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6475409836065573) internal successors, (646), 244 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 646 transitions. [2022-02-16 13:54:09,669 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 646 transitions. Word has length 20 [2022-02-16 13:54:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:09,669 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 646 transitions. [2022-02-16 13:54:09,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:09,669 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 646 transitions. [2022-02-16 13:54:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:09,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:09,670 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:09,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:09,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:09,875 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash 620498802, now seen corresponding path program 363 times [2022-02-16 13:54:09,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:09,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572507126] [2022-02-16 13:54:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:09,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:09,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:09,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572507126] [2022-02-16 13:54:09,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572507126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:09,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966759718] [2022-02-16 13:54:09,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:54:09,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:09,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:09,998 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:10,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-02-16 13:54:10,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:54:10,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:10,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:10,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:10,596 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:10,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:10,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966759718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:10,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:10,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:10,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009190044] [2022-02-16 13:54:10,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:10,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:10,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:10,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:10,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:10,602 INFO L87 Difference]: Start difference. First operand 245 states and 646 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:10,876 INFO L93 Difference]: Finished difference Result 299 states and 763 transitions. [2022-02-16 13:54:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:10,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:10,877 INFO L225 Difference]: With dead ends: 299 [2022-02-16 13:54:10,877 INFO L226 Difference]: Without dead ends: 299 [2022-02-16 13:54:10,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:54:10,877 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:10,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 108 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-16 13:54:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 243. [2022-02-16 13:54:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6404958677685952) internal successors, (639), 242 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 639 transitions. [2022-02-16 13:54:10,880 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 639 transitions. Word has length 20 [2022-02-16 13:54:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:10,880 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 639 transitions. [2022-02-16 13:54:10,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 639 transitions. [2022-02-16 13:54:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:10,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:10,881 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:10,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:11,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:11,097 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash 456289406, now seen corresponding path program 364 times [2022-02-16 13:54:11,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:11,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319568661] [2022-02-16 13:54:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:11,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:11,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:11,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319568661] [2022-02-16 13:54:11,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319568661] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:11,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691057032] [2022-02-16 13:54:11,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:54:11,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:11,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:11,171 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:11,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-02-16 13:54:11,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:54:11,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:11,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:11,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:54:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:11,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:11,749 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:11,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:11,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691057032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:11,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:11,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:11,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370941087] [2022-02-16 13:54:11,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:11,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:11,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:11,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:11,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:11,754 INFO L87 Difference]: Start difference. First operand 243 states and 639 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:12,036 INFO L93 Difference]: Finished difference Result 301 states and 749 transitions. [2022-02-16 13:54:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:12,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:12,037 INFO L225 Difference]: With dead ends: 301 [2022-02-16 13:54:12,037 INFO L226 Difference]: Without dead ends: 299 [2022-02-16 13:54:12,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:54:12,037 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 120 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:12,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 106 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-16 13:54:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 247. [2022-02-16 13:54:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6504065040650406) internal successors, (652), 246 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 652 transitions. [2022-02-16 13:54:12,040 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 652 transitions. Word has length 20 [2022-02-16 13:54:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:12,040 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 652 transitions. [2022-02-16 13:54:12,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 652 transitions. [2022-02-16 13:54:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:12,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:12,040 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:12,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:12,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-02-16 13:54:12,243 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:12,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:12,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1571387202, now seen corresponding path program 365 times [2022-02-16 13:54:12,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:12,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778710866] [2022-02-16 13:54:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:12,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:12,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:12,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778710866] [2022-02-16 13:54:12,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778710866] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:12,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559373122] [2022-02-16 13:54:12,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:54:12,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:12,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:12,328 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:12,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-02-16 13:54:12,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:54:12,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:12,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:12,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:12,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:54:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:12,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:13,014 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:13,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:13,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559373122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:13,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:13,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:13,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122992752] [2022-02-16 13:54:13,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:13,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:13,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:13,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:13,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:13,020 INFO L87 Difference]: Start difference. First operand 247 states and 652 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:13,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:13,374 INFO L93 Difference]: Finished difference Result 303 states and 755 transitions. [2022-02-16 13:54:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:54:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:13,375 INFO L225 Difference]: With dead ends: 303 [2022-02-16 13:54:13,375 INFO L226 Difference]: Without dead ends: 303 [2022-02-16 13:54:13,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:54:13,375 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:13,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 134 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-16 13:54:13,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 245. [2022-02-16 13:54:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6434426229508197) internal successors, (645), 244 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 645 transitions. [2022-02-16 13:54:13,378 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 645 transitions. Word has length 20 [2022-02-16 13:54:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:13,378 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 645 transitions. [2022-02-16 13:54:13,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 645 transitions. [2022-02-16 13:54:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:13,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:13,378 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:13,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:13,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-02-16 13:54:13,579 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1240445156, now seen corresponding path program 366 times [2022-02-16 13:54:13,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:13,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894399352] [2022-02-16 13:54:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:13,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:13,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:13,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894399352] [2022-02-16 13:54:13,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894399352] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:13,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121903962] [2022-02-16 13:54:13,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:54:13,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:13,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:13,677 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:13,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-02-16 13:54:13,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:54:13,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:13,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:14,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:14,307 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:14,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:14,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121903962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:14,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:14,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:14,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539862841] [2022-02-16 13:54:14,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:14,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:14,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:14,314 INFO L87 Difference]: Start difference. First operand 245 states and 645 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:14,628 INFO L93 Difference]: Finished difference Result 285 states and 733 transitions. [2022-02-16 13:54:14,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:14,628 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:14,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:14,629 INFO L225 Difference]: With dead ends: 285 [2022-02-16 13:54:14,629 INFO L226 Difference]: Without dead ends: 285 [2022-02-16 13:54:14,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:54:14,629 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:14,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 111 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-16 13:54:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 245. [2022-02-16 13:54:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6434426229508197) internal successors, (645), 244 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 645 transitions. [2022-02-16 13:54:14,632 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 645 transitions. Word has length 20 [2022-02-16 13:54:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:14,632 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 645 transitions. [2022-02-16 13:54:14,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 645 transitions. [2022-02-16 13:54:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:14,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:14,632 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:14,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-02-16 13:54:14,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-02-16 13:54:14,833 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:14,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:14,833 INFO L85 PathProgramCache]: Analyzing trace with hash -278463546, now seen corresponding path program 367 times [2022-02-16 13:54:14,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:14,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241994850] [2022-02-16 13:54:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:14,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:14,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:14,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241994850] [2022-02-16 13:54:14,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241994850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:14,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841351642] [2022-02-16 13:54:14,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:14,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:14,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:14,924 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:14,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-02-16 13:54:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:15,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:15,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:15,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:54:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:15,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:15,456 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:15,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:15,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841351642] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:15,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:15,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:54:15,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623816135] [2022-02-16 13:54:15,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:15,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:54:15,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:54:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:54:15,462 INFO L87 Difference]: Start difference. First operand 245 states and 645 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:15,718 INFO L93 Difference]: Finished difference Result 370 states and 889 transitions. [2022-02-16 13:54:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:15,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:15,719 INFO L225 Difference]: With dead ends: 370 [2022-02-16 13:54:15,719 INFO L226 Difference]: Without dead ends: 370 [2022-02-16 13:54:15,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:54:15,719 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:15,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 147 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-16 13:54:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 245. [2022-02-16 13:54:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6434426229508197) internal successors, (645), 244 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 645 transitions. [2022-02-16 13:54:15,722 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 645 transitions. Word has length 20 [2022-02-16 13:54:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:15,723 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 645 transitions. [2022-02-16 13:54:15,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 645 transitions. [2022-02-16 13:54:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:15,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:15,723 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:15,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Ended with exit code 0 [2022-02-16 13:54:15,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:15,923 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash -788239998, now seen corresponding path program 368 times [2022-02-16 13:54:15,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:15,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433020652] [2022-02-16 13:54:15,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:15,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:16,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:16,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433020652] [2022-02-16 13:54:16,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433020652] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:16,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474834476] [2022-02-16 13:54:16,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:16,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:16,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:16,014 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:16,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-02-16 13:54:16,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:16,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:16,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:16,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:16,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:54:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:16,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:16,603 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:16,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:16,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474834476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:16,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:16,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:16,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513776015] [2022-02-16 13:54:16,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:16,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:16,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:16,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:16,609 INFO L87 Difference]: Start difference. First operand 245 states and 645 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:16,874 INFO L93 Difference]: Finished difference Result 398 states and 942 transitions. [2022-02-16 13:54:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:16,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:16,875 INFO L225 Difference]: With dead ends: 398 [2022-02-16 13:54:16,875 INFO L226 Difference]: Without dead ends: 398 [2022-02-16 13:54:16,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:54:16,875 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:16,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 147 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-16 13:54:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 248. [2022-02-16 13:54:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.651821862348178) internal successors, (655), 247 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 655 transitions. [2022-02-16 13:54:16,878 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 655 transitions. Word has length 20 [2022-02-16 13:54:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:16,878 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 655 transitions. [2022-02-16 13:54:16,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 655 transitions. [2022-02-16 13:54:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:16,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:16,879 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:16,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:17,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:17,087 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:17,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash -983672826, now seen corresponding path program 369 times [2022-02-16 13:54:17,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:17,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619608000] [2022-02-16 13:54:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:17,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:17,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:17,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619608000] [2022-02-16 13:54:17,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619608000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:17,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390327825] [2022-02-16 13:54:17,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:54:17,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:17,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:17,154 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:17,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-02-16 13:54:17,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:54:17,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:17,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:17,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:17,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-02-16 13:54:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:17,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:17,656 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:17,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:17,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390327825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:17,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:17,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:17,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211585107] [2022-02-16 13:54:17,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:17,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:17,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:17,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:17,662 INFO L87 Difference]: Start difference. First operand 248 states and 655 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:17,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:17,836 INFO L93 Difference]: Finished difference Result 377 states and 915 transitions. [2022-02-16 13:54:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:17,837 INFO L225 Difference]: With dead ends: 377 [2022-02-16 13:54:17,837 INFO L226 Difference]: Without dead ends: 377 [2022-02-16 13:54:17,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:54:17,837 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:17,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 122 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:54:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-16 13:54:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 243. [2022-02-16 13:54:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6322314049586777) internal successors, (637), 242 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 637 transitions. [2022-02-16 13:54:17,840 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 637 transitions. Word has length 20 [2022-02-16 13:54:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:17,840 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 637 transitions. [2022-02-16 13:54:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 637 transitions. [2022-02-16 13:54:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:17,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:17,840 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:17,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2022-02-16 13:54:18,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:18,052 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1648894832, now seen corresponding path program 370 times [2022-02-16 13:54:18,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:18,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348368758] [2022-02-16 13:54:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:18,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:18,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:18,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348368758] [2022-02-16 13:54:18,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348368758] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:18,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840681462] [2022-02-16 13:54:18,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:54:18,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:18,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:18,142 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:18,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-02-16 13:54:18,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:54:18,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:18,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:18,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:18,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:18,765 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:18,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:18,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840681462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:18,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:18,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:18,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604871218] [2022-02-16 13:54:18,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:18,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:18,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:18,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:18,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:18,770 INFO L87 Difference]: Start difference. First operand 243 states and 637 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:19,036 INFO L93 Difference]: Finished difference Result 357 states and 838 transitions. [2022-02-16 13:54:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:19,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:19,037 INFO L225 Difference]: With dead ends: 357 [2022-02-16 13:54:19,037 INFO L226 Difference]: Without dead ends: 357 [2022-02-16 13:54:19,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:54:19,037 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 123 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:19,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 185 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-02-16 13:54:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 245. [2022-02-16 13:54:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6188524590163933) internal successors, (639), 244 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 639 transitions. [2022-02-16 13:54:19,040 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 639 transitions. Word has length 20 [2022-02-16 13:54:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:19,040 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 639 transitions. [2022-02-16 13:54:19,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 639 transitions. [2022-02-16 13:54:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:19,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:19,041 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:19,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:19,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:19,257 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:19,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1651520608, now seen corresponding path program 371 times [2022-02-16 13:54:19,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:19,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857573855] [2022-02-16 13:54:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:19,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:19,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:19,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857573855] [2022-02-16 13:54:19,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857573855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:19,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046354619] [2022-02-16 13:54:19,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:54:19,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:19,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:19,311 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:19,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-02-16 13:54:19,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:19,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:19,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:19,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:19,870 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:19,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:19,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046354619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:19,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:19,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:19,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430308768] [2022-02-16 13:54:19,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:19,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:19,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:19,875 INFO L87 Difference]: Start difference. First operand 245 states and 639 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:20,086 INFO L93 Difference]: Finished difference Result 312 states and 764 transitions. [2022-02-16 13:54:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:20,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:20,087 INFO L225 Difference]: With dead ends: 312 [2022-02-16 13:54:20,087 INFO L226 Difference]: Without dead ends: 312 [2022-02-16 13:54:20,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:54:20,087 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:20,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 125 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-16 13:54:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 240. [2022-02-16 13:54:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6276150627615062) internal successors, (628), 239 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 628 transitions. [2022-02-16 13:54:20,090 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 628 transitions. Word has length 20 [2022-02-16 13:54:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:20,090 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 628 transitions. [2022-02-16 13:54:20,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 628 transitions. [2022-02-16 13:54:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:20,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:20,090 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:20,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-02-16 13:54:20,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:20,305 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:20,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1956678804, now seen corresponding path program 372 times [2022-02-16 13:54:20,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:20,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838006175] [2022-02-16 13:54:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:20,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:20,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:20,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838006175] [2022-02-16 13:54:20,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838006175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:20,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012823001] [2022-02-16 13:54:20,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:54:20,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:20,394 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:20,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-02-16 13:54:20,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:54:20,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:20,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:20,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:20,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:20,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:21,033 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:21,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:21,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012823001] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:21,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:21,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:21,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830715614] [2022-02-16 13:54:21,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:21,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:21,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:21,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:21,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:21,039 INFO L87 Difference]: Start difference. First operand 240 states and 628 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:21,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:21,321 INFO L93 Difference]: Finished difference Result 318 states and 780 transitions. [2022-02-16 13:54:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:21,322 INFO L225 Difference]: With dead ends: 318 [2022-02-16 13:54:21,322 INFO L226 Difference]: Without dead ends: 318 [2022-02-16 13:54:21,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:54:21,322 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:21,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 141 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-16 13:54:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 230. [2022-02-16 13:54:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.606986899563319) internal successors, (597), 229 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 597 transitions. [2022-02-16 13:54:21,325 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 597 transitions. Word has length 20 [2022-02-16 13:54:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:21,325 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 597 transitions. [2022-02-16 13:54:21,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:21,325 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 597 transitions. [2022-02-16 13:54:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:21,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:21,325 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:21,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:21,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:21,525 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash 137364606, now seen corresponding path program 373 times [2022-02-16 13:54:21,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:21,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067804163] [2022-02-16 13:54:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:21,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:21,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:21,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067804163] [2022-02-16 13:54:21,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067804163] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:21,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582805694] [2022-02-16 13:54:21,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:21,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:21,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:21,639 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:21,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-02-16 13:54:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:21,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:22,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:22,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:22,328 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:22,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:22,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582805694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:22,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:22,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:22,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687446656] [2022-02-16 13:54:22,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:22,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:22,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:22,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:22,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:22,334 INFO L87 Difference]: Start difference. First operand 230 states and 597 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:22,632 INFO L93 Difference]: Finished difference Result 351 states and 819 transitions. [2022-02-16 13:54:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:22,632 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:22,633 INFO L225 Difference]: With dead ends: 351 [2022-02-16 13:54:22,633 INFO L226 Difference]: Without dead ends: 351 [2022-02-16 13:54:22,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:54:22,633 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 244 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:22,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 166 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-16 13:54:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 238. [2022-02-16 13:54:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6413502109704643) internal successors, (626), 237 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 626 transitions. [2022-02-16 13:54:22,636 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 626 transitions. Word has length 20 [2022-02-16 13:54:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:22,636 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 626 transitions. [2022-02-16 13:54:22,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 626 transitions. [2022-02-16 13:54:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:22,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:22,636 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:22,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:22,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2022-02-16 13:54:22,852 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash -55442446, now seen corresponding path program 374 times [2022-02-16 13:54:22,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:22,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725419926] [2022-02-16 13:54:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:22,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:22,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:22,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725419926] [2022-02-16 13:54:22,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725419926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:22,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403172061] [2022-02-16 13:54:22,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:22,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:22,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:22,916 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:22,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-02-16 13:54:23,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:23,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:23,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:23,420 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:23,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:23,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403172061] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:23,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:23,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:54:23,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267407315] [2022-02-16 13:54:23,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:23,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:54:23,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:23,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:54:23,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:54:23,425 INFO L87 Difference]: Start difference. First operand 238 states and 626 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:23,621 INFO L93 Difference]: Finished difference Result 333 states and 794 transitions. [2022-02-16 13:54:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:23,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:23,622 INFO L225 Difference]: With dead ends: 333 [2022-02-16 13:54:23,622 INFO L226 Difference]: Without dead ends: 333 [2022-02-16 13:54:23,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:23,622 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:23,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:54:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-02-16 13:54:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 237. [2022-02-16 13:54:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.639830508474576) internal successors, (623), 236 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 623 transitions. [2022-02-16 13:54:23,625 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 623 transitions. Word has length 20 [2022-02-16 13:54:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:23,625 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 623 transitions. [2022-02-16 13:54:23,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 623 transitions. [2022-02-16 13:54:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:23,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:23,625 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:23,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:23,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-02-16 13:54:23,835 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:23,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1120048198, now seen corresponding path program 375 times [2022-02-16 13:54:23,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:23,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968413351] [2022-02-16 13:54:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:23,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:23,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:23,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968413351] [2022-02-16 13:54:23,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968413351] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:23,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592926037] [2022-02-16 13:54:23,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:54:23,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:23,894 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:23,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-02-16 13:54:24,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:54:24,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:24,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:24,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:24,437 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:24,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:24,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592926037] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:24,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:24,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:54:24,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707379642] [2022-02-16 13:54:24,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:24,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:54:24,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:24,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:54:24,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:54:24,443 INFO L87 Difference]: Start difference. First operand 237 states and 623 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:24,728 INFO L93 Difference]: Finished difference Result 328 states and 784 transitions. [2022-02-16 13:54:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:24,729 INFO L225 Difference]: With dead ends: 328 [2022-02-16 13:54:24,729 INFO L226 Difference]: Without dead ends: 328 [2022-02-16 13:54:24,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:54:24,729 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 135 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:24,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 161 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-16 13:54:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 241. [2022-02-16 13:54:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.625) internal successors, (630), 240 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 630 transitions. [2022-02-16 13:54:24,733 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 630 transitions. Word has length 20 [2022-02-16 13:54:24,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:24,733 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 630 transitions. [2022-02-16 13:54:24,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 630 transitions. [2022-02-16 13:54:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:24,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:24,734 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:24,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:24,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-02-16 13:54:24,947 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1330765472, now seen corresponding path program 376 times [2022-02-16 13:54:24,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:24,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185541229] [2022-02-16 13:54:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:24,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:25,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:25,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185541229] [2022-02-16 13:54:25,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185541229] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:25,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106247372] [2022-02-16 13:54:25,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:54:25,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:25,034 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:25,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-02-16 13:54:25,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:54:25,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:25,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:25,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:25,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:25,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:25,662 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:25,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:25,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106247372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:25,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:25,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:25,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324516121] [2022-02-16 13:54:25,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:25,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:25,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:25,667 INFO L87 Difference]: Start difference. First operand 241 states and 630 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:26,028 INFO L93 Difference]: Finished difference Result 342 states and 809 transitions. [2022-02-16 13:54:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:54:26,028 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:26,029 INFO L225 Difference]: With dead ends: 342 [2022-02-16 13:54:26,029 INFO L226 Difference]: Without dead ends: 342 [2022-02-16 13:54:26,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:54:26,029 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 141 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:26,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 156 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-02-16 13:54:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 231. [2022-02-16 13:54:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.5956521739130434) internal successors, (597), 230 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 597 transitions. [2022-02-16 13:54:26,032 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 597 transitions. Word has length 20 [2022-02-16 13:54:26,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:26,032 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 597 transitions. [2022-02-16 13:54:26,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 597 transitions. [2022-02-16 13:54:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:26,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:26,032 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:26,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-02-16 13:54:26,239 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash 210382218, now seen corresponding path program 377 times [2022-02-16 13:54:26,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:26,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349059542] [2022-02-16 13:54:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:26,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:26,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:26,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349059542] [2022-02-16 13:54:26,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349059542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:26,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522521064] [2022-02-16 13:54:26,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:54:26,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:26,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:26,341 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:26,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-02-16 13:54:26,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:54:26,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:26,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:26,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:26,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:26,972 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:26,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:26,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522521064] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:26,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:26,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:54:26,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038502157] [2022-02-16 13:54:26,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:26,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:54:26,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:26,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:54:26,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:54:26,978 INFO L87 Difference]: Start difference. First operand 231 states and 597 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:27,363 INFO L93 Difference]: Finished difference Result 408 states and 927 transitions. [2022-02-16 13:54:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:27,364 INFO L225 Difference]: With dead ends: 408 [2022-02-16 13:54:27,364 INFO L226 Difference]: Without dead ends: 408 [2022-02-16 13:54:27,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:54:27,364 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 259 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:27,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 115 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:54:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-02-16 13:54:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 239. [2022-02-16 13:54:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.638655462184874) internal successors, (628), 238 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 628 transitions. [2022-02-16 13:54:27,367 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 628 transitions. Word has length 20 [2022-02-16 13:54:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:27,367 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 628 transitions. [2022-02-16 13:54:27,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 628 transitions. [2022-02-16 13:54:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:27,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:27,367 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:27,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-02-16 13:54:27,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-02-16 13:54:27,571 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash 924915074, now seen corresponding path program 378 times [2022-02-16 13:54:27,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:27,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572770855] [2022-02-16 13:54:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:27,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:27,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:27,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572770855] [2022-02-16 13:54:27,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572770855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:27,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357361070] [2022-02-16 13:54:27,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:54:27,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:27,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:27,682 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:27,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-02-16 13:54:27,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:54:27,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:27,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:27,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:28,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:28,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:28,391 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:28,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:28,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357361070] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:28,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:28,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:28,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431706457] [2022-02-16 13:54:28,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:28,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:28,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:28,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:28,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:28,397 INFO L87 Difference]: Start difference. First operand 239 states and 628 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:28,720 INFO L93 Difference]: Finished difference Result 384 states and 897 transitions. [2022-02-16 13:54:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:28,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:28,721 INFO L225 Difference]: With dead ends: 384 [2022-02-16 13:54:28,721 INFO L226 Difference]: Without dead ends: 383 [2022-02-16 13:54:28,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:54:28,721 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 188 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:28,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 131 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-16 13:54:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 236. [2022-02-16 13:54:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6382978723404253) internal successors, (620), 235 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 620 transitions. [2022-02-16 13:54:28,724 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 620 transitions. Word has length 20 [2022-02-16 13:54:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:28,724 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 620 transitions. [2022-02-16 13:54:28,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:28,724 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 620 transitions. [2022-02-16 13:54:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:28,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:28,724 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:28,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:28,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2022-02-16 13:54:28,941 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:28,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:28,941 INFO L85 PathProgramCache]: Analyzing trace with hash 418675526, now seen corresponding path program 379 times [2022-02-16 13:54:28,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:28,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813376570] [2022-02-16 13:54:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:28,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:29,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:29,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813376570] [2022-02-16 13:54:29,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813376570] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:29,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927610563] [2022-02-16 13:54:29,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:29,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:29,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:29,044 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:29,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-02-16 13:54:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:29,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:29,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:29,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:29,667 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:29,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:29,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927610563] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:29,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:29,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:29,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899474001] [2022-02-16 13:54:29,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:29,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:29,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:29,672 INFO L87 Difference]: Start difference. First operand 236 states and 620 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:30,196 INFO L93 Difference]: Finished difference Result 421 states and 964 transitions. [2022-02-16 13:54:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:30,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:30,197 INFO L225 Difference]: With dead ends: 421 [2022-02-16 13:54:30,197 INFO L226 Difference]: Without dead ends: 421 [2022-02-16 13:54:30,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:54:30,197 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 263 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:30,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 170 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-02-16 13:54:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 238. [2022-02-16 13:54:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.654008438818565) internal successors, (629), 237 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 629 transitions. [2022-02-16 13:54:30,200 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 629 transitions. Word has length 20 [2022-02-16 13:54:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:30,200 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 629 transitions. [2022-02-16 13:54:30,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 629 transitions. [2022-02-16 13:54:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:30,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:30,201 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:30,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:30,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:30,408 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:30,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1108397450, now seen corresponding path program 380 times [2022-02-16 13:54:30,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:30,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938390570] [2022-02-16 13:54:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:30,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:30,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:30,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938390570] [2022-02-16 13:54:30,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938390570] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:30,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055204192] [2022-02-16 13:54:30,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:30,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:30,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:30,520 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:30,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-02-16 13:54:30,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:30,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:30,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:30,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:30,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:30,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:31,138 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:31,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:31,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055204192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:31,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:31,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:31,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625148250] [2022-02-16 13:54:31,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:31,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:31,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:31,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:31,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:31,143 INFO L87 Difference]: Start difference. First operand 238 states and 629 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:31,722 INFO L93 Difference]: Finished difference Result 407 states and 949 transitions. [2022-02-16 13:54:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:31,723 INFO L225 Difference]: With dead ends: 407 [2022-02-16 13:54:31,723 INFO L226 Difference]: Without dead ends: 407 [2022-02-16 13:54:31,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:54:31,724 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 206 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:31,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 175 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-16 13:54:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 236. [2022-02-16 13:54:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6382978723404253) internal successors, (620), 235 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 620 transitions. [2022-02-16 13:54:31,727 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 620 transitions. Word has length 20 [2022-02-16 13:54:31,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:31,727 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 620 transitions. [2022-02-16 13:54:31,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:31,727 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 620 transitions. [2022-02-16 13:54:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:31,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:31,727 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:31,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:31,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2022-02-16 13:54:31,943 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:31,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1533777794, now seen corresponding path program 381 times [2022-02-16 13:54:31,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:31,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682934215] [2022-02-16 13:54:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:31,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:32,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:32,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682934215] [2022-02-16 13:54:32,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682934215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:32,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108725932] [2022-02-16 13:54:32,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:54:32,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:32,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:32,039 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:32,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-02-16 13:54:32,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:54:32,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:32,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:32,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:32,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:32,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:32,611 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:32,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:32,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108725932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:32,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:32,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:32,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440149217] [2022-02-16 13:54:32,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:32,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:32,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:32,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:32,630 INFO L87 Difference]: Start difference. First operand 236 states and 620 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:33,093 INFO L93 Difference]: Finished difference Result 406 states and 927 transitions. [2022-02-16 13:54:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:33,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:33,095 INFO L225 Difference]: With dead ends: 406 [2022-02-16 13:54:33,095 INFO L226 Difference]: Without dead ends: 404 [2022-02-16 13:54:33,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:54:33,095 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 196 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:33,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 178 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:33,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-16 13:54:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 239. [2022-02-16 13:54:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.638655462184874) internal successors, (628), 238 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 628 transitions. [2022-02-16 13:54:33,104 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 628 transitions. Word has length 20 [2022-02-16 13:54:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:33,104 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 628 transitions. [2022-02-16 13:54:33,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 628 transitions. [2022-02-16 13:54:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:33,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:33,106 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:33,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-02-16 13:54:33,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:33,323 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:33,330 INFO L85 PathProgramCache]: Analyzing trace with hash -418679998, now seen corresponding path program 382 times [2022-02-16 13:54:33,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:33,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793453132] [2022-02-16 13:54:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:33,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:33,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:33,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793453132] [2022-02-16 13:54:33,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793453132] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:33,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119002035] [2022-02-16 13:54:33,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:54:33,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:33,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:33,431 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:33,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-02-16 13:54:33,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:54:33,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:33,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:33,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:54:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:33,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:34,076 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:34,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:34,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119002035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:34,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:34,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:34,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526316341] [2022-02-16 13:54:34,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:34,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:34,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:34,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:34,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:34,083 INFO L87 Difference]: Start difference. First operand 239 states and 628 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:34,554 INFO L93 Difference]: Finished difference Result 399 states and 925 transitions. [2022-02-16 13:54:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:54:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:34,555 INFO L225 Difference]: With dead ends: 399 [2022-02-16 13:54:34,555 INFO L226 Difference]: Without dead ends: 399 [2022-02-16 13:54:34,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:54:34,555 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 182 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:34,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 158 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-16 13:54:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 237. [2022-02-16 13:54:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6228813559322033) internal successors, (619), 236 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:34,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 619 transitions. [2022-02-16 13:54:34,558 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 619 transitions. Word has length 20 [2022-02-16 13:54:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:34,559 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 619 transitions. [2022-02-16 13:54:34,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 619 transitions. [2022-02-16 13:54:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:34,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:34,559 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:34,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:34,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:34,775 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:34,776 INFO L85 PathProgramCache]: Analyzing trace with hash -848781652, now seen corresponding path program 383 times [2022-02-16 13:54:34,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:34,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382153773] [2022-02-16 13:54:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:34,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:34,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:34,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382153773] [2022-02-16 13:54:34,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382153773] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:34,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483250884] [2022-02-16 13:54:34,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:54:34,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:34,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:34,898 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:34,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-02-16 13:54:35,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:54:35,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:35,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:35,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:35,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:35,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:35,524 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:35,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:35,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483250884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:35,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:35,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:35,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234205749] [2022-02-16 13:54:35,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:35,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:35,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:35,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:35,530 INFO L87 Difference]: Start difference. First operand 237 states and 619 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:35,891 INFO L93 Difference]: Finished difference Result 379 states and 906 transitions. [2022-02-16 13:54:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:35,905 INFO L225 Difference]: With dead ends: 379 [2022-02-16 13:54:35,905 INFO L226 Difference]: Without dead ends: 379 [2022-02-16 13:54:35,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:54:35,905 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 186 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:35,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 130 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-02-16 13:54:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 241. [2022-02-16 13:54:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6458333333333335) internal successors, (635), 240 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 635 transitions. [2022-02-16 13:54:35,908 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 635 transitions. Word has length 20 [2022-02-16 13:54:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:35,908 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 635 transitions. [2022-02-16 13:54:35,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 635 transitions. [2022-02-16 13:54:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:35,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:35,909 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:35,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Ended with exit code 0 [2022-02-16 13:54:36,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2022-02-16 13:54:36,110 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:36,110 INFO L85 PathProgramCache]: Analyzing trace with hash -159059728, now seen corresponding path program 384 times [2022-02-16 13:54:36,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:36,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556405615] [2022-02-16 13:54:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:36,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:36,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:36,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556405615] [2022-02-16 13:54:36,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556405615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:36,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86894663] [2022-02-16 13:54:36,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:54:36,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:36,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:36,209 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:36,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-02-16 13:54:36,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:54:36,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:36,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:36,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:36,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:36,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:36,858 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:36,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:36,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86894663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:36,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:36,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:54:36,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499005285] [2022-02-16 13:54:36,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:36,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:54:36,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:54:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:54:36,864 INFO L87 Difference]: Start difference. First operand 241 states and 635 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:37,305 INFO L93 Difference]: Finished difference Result 377 states and 903 transitions. [2022-02-16 13:54:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:54:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:37,306 INFO L225 Difference]: With dead ends: 377 [2022-02-16 13:54:37,306 INFO L226 Difference]: Without dead ends: 377 [2022-02-16 13:54:37,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:54:37,306 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 123 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:37,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 146 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-16 13:54:37,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 239. [2022-02-16 13:54:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.630252100840336) internal successors, (626), 238 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 626 transitions. [2022-02-16 13:54:37,309 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 626 transitions. Word has length 20 [2022-02-16 13:54:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:37,309 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 626 transitions. [2022-02-16 13:54:37,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:37,310 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 626 transitions. [2022-02-16 13:54:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:37,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:37,310 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:37,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:37,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:37,526 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash -454486910, now seen corresponding path program 385 times [2022-02-16 13:54:37,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:37,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603315487] [2022-02-16 13:54:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:37,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:37,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:37,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603315487] [2022-02-16 13:54:37,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603315487] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:37,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643987770] [2022-02-16 13:54:37,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:37,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:37,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:37,617 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:37,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-02-16 13:54:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:38,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:38,303 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:38,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:38,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643987770] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:38,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:38,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:38,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849952269] [2022-02-16 13:54:38,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:38,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:38,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:38,309 INFO L87 Difference]: Start difference. First operand 239 states and 626 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:38,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:38,668 INFO L93 Difference]: Finished difference Result 352 states and 857 transitions. [2022-02-16 13:54:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:38,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:38,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:38,668 INFO L225 Difference]: With dead ends: 352 [2022-02-16 13:54:38,668 INFO L226 Difference]: Without dead ends: 352 [2022-02-16 13:54:38,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:54:38,669 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:38,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 130 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-16 13:54:38,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 237. [2022-02-16 13:54:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6228813559322033) internal successors, (619), 236 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 619 transitions. [2022-02-16 13:54:38,671 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 619 transitions. Word has length 20 [2022-02-16 13:54:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:38,671 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 619 transitions. [2022-02-16 13:54:38,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 619 transitions. [2022-02-16 13:54:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:38,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:38,672 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:38,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:38,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:38,879 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:38,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:38,879 INFO L85 PathProgramCache]: Analyzing trace with hash -618696306, now seen corresponding path program 386 times [2022-02-16 13:54:38,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:38,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710986222] [2022-02-16 13:54:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:38,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:38,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:38,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710986222] [2022-02-16 13:54:38,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710986222] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:38,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376260715] [2022-02-16 13:54:38,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:38,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:38,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:38,981 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:38,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-02-16 13:54:39,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:39,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:39,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:39,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:39,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:54:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:39,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:39,619 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:39,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:39,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376260715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:39,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:39,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:39,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577513770] [2022-02-16 13:54:39,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:39,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:39,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:39,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:39,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:39,625 INFO L87 Difference]: Start difference. First operand 237 states and 619 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:39,952 INFO L93 Difference]: Finished difference Result 362 states and 857 transitions. [2022-02-16 13:54:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:39,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:39,953 INFO L225 Difference]: With dead ends: 362 [2022-02-16 13:54:39,953 INFO L226 Difference]: Without dead ends: 360 [2022-02-16 13:54:39,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:54:39,953 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 191 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:39,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 124 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-16 13:54:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 241. [2022-02-16 13:54:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6333333333333333) internal successors, (632), 240 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 632 transitions. [2022-02-16 13:54:39,956 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 632 transitions. Word has length 20 [2022-02-16 13:54:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:39,956 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 632 transitions. [2022-02-16 13:54:39,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 632 transitions. [2022-02-16 13:54:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:39,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:39,956 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:39,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Ended with exit code 0 [2022-02-16 13:54:40,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:40,157 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:40,157 INFO L85 PathProgramCache]: Analyzing trace with hash 496401490, now seen corresponding path program 387 times [2022-02-16 13:54:40,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:40,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099266025] [2022-02-16 13:54:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:40,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:40,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:40,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099266025] [2022-02-16 13:54:40,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099266025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:40,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795618547] [2022-02-16 13:54:40,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:54:40,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:40,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:40,260 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:40,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-02-16 13:54:40,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:54:40,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:40,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:40,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:54:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:40,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:40,925 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:40,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:40,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795618547] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:40,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:40,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:40,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461618561] [2022-02-16 13:54:40,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:40,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:40,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:40,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:40,931 INFO L87 Difference]: Start difference. First operand 241 states and 632 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:41,388 INFO L93 Difference]: Finished difference Result 364 states and 863 transitions. [2022-02-16 13:54:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:54:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:41,389 INFO L225 Difference]: With dead ends: 364 [2022-02-16 13:54:41,389 INFO L226 Difference]: Without dead ends: 364 [2022-02-16 13:54:41,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:54:41,389 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:41,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 148 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-16 13:54:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 239. [2022-02-16 13:54:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6260504201680672) internal successors, (625), 238 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 625 transitions. [2022-02-16 13:54:41,392 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 625 transitions. Word has length 20 [2022-02-16 13:54:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:41,392 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 625 transitions. [2022-02-16 13:54:41,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 625 transitions. [2022-02-16 13:54:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:41,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:41,392 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:41,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:41,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-02-16 13:54:41,599 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:41,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1979536428, now seen corresponding path program 388 times [2022-02-16 13:54:41,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:41,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299626066] [2022-02-16 13:54:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:41,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:41,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:41,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299626066] [2022-02-16 13:54:41,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299626066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:41,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098197358] [2022-02-16 13:54:41,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:54:41,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:41,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:41,670 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:41,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-02-16 13:54:41,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:54:41,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:42,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:42,267 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:42,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:42,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098197358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:42,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:42,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:42,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235531042] [2022-02-16 13:54:42,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:42,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:42,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:42,272 INFO L87 Difference]: Start difference. First operand 239 states and 625 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:42,606 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2022-02-16 13:54:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:42,607 INFO L225 Difference]: With dead ends: 346 [2022-02-16 13:54:42,607 INFO L226 Difference]: Without dead ends: 346 [2022-02-16 13:54:42,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:54:42,607 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:42,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 127 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-16 13:54:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 238. [2022-02-16 13:54:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6244725738396624) internal successors, (622), 237 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 622 transitions. [2022-02-16 13:54:42,610 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 622 transitions. Word has length 20 [2022-02-16 13:54:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:42,610 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 622 transitions. [2022-02-16 13:54:42,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 622 transitions. [2022-02-16 13:54:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:42,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:42,611 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:42,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Ended with exit code 0 [2022-02-16 13:54:42,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-02-16 13:54:42,827 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1909559742, now seen corresponding path program 389 times [2022-02-16 13:54:42,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:42,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940821509] [2022-02-16 13:54:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:42,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:42,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:42,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940821509] [2022-02-16 13:54:42,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940821509] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:42,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752330608] [2022-02-16 13:54:42,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:54:42,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:42,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:42,917 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:42,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-02-16 13:54:43,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:54:43,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:43,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:43,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:43,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:43,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:43,511 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:43,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:43,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752330608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:43,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:43,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:54:43,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419399693] [2022-02-16 13:54:43,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:43,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:54:43,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:54:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:54:43,516 INFO L87 Difference]: Start difference. First operand 238 states and 622 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:43,713 INFO L93 Difference]: Finished difference Result 406 states and 953 transitions. [2022-02-16 13:54:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:43,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:43,714 INFO L225 Difference]: With dead ends: 406 [2022-02-16 13:54:43,714 INFO L226 Difference]: Without dead ends: 406 [2022-02-16 13:54:43,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:54:43,714 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 135 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:43,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 113 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:54:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-02-16 13:54:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 240. [2022-02-16 13:54:43,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6276150627615062) internal successors, (628), 239 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 628 transitions. [2022-02-16 13:54:43,718 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 628 transitions. Word has length 20 [2022-02-16 13:54:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:43,718 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 628 transitions. [2022-02-16 13:54:43,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 628 transitions. [2022-02-16 13:54:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:43,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:43,718 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:43,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:43,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:43,935 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1219837818, now seen corresponding path program 390 times [2022-02-16 13:54:43,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:43,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195957816] [2022-02-16 13:54:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:43,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:44,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:44,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195957816] [2022-02-16 13:54:44,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195957816] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:44,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639978901] [2022-02-16 13:54:44,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:54:44,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:44,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:44,020 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:44,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-02-16 13:54:44,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:54:44,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:44,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:44,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:54:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:44,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:44,708 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:44,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:44,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639978901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:44,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:44,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:44,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22178212] [2022-02-16 13:54:44,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:44,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:44,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:44,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:44,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:44,714 INFO L87 Difference]: Start difference. First operand 240 states and 628 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:45,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:45,159 INFO L93 Difference]: Finished difference Result 407 states and 956 transitions. [2022-02-16 13:54:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:54:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:45,160 INFO L225 Difference]: With dead ends: 407 [2022-02-16 13:54:45,160 INFO L226 Difference]: Without dead ends: 407 [2022-02-16 13:54:45,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:54:45,160 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 177 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:45,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 179 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:45,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-16 13:54:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 238. [2022-02-16 13:54:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.611814345991561) internal successors, (619), 237 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 619 transitions. [2022-02-16 13:54:45,163 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 619 transitions. Word has length 20 [2022-02-16 13:54:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:45,163 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 619 transitions. [2022-02-16 13:54:45,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 619 transitions. [2022-02-16 13:54:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:45,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:45,164 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:45,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:45,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2022-02-16 13:54:45,371 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:45,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1515265000, now seen corresponding path program 391 times [2022-02-16 13:54:45,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:45,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98651390] [2022-02-16 13:54:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:45,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:45,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:45,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98651390] [2022-02-16 13:54:45,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98651390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:45,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572226116] [2022-02-16 13:54:45,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:45,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:45,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:45,443 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:45,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-02-16 13:54:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:45,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:45,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:45,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:45,944 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:45,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:45,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572226116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:45,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:45,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:54:45,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615628896] [2022-02-16 13:54:45,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:45,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:54:45,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:54:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:54:45,948 INFO L87 Difference]: Start difference. First operand 238 states and 619 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:46,215 INFO L93 Difference]: Finished difference Result 380 states and 903 transitions. [2022-02-16 13:54:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:46,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:46,216 INFO L225 Difference]: With dead ends: 380 [2022-02-16 13:54:46,216 INFO L226 Difference]: Without dead ends: 380 [2022-02-16 13:54:46,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:54:46,216 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:46,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 121 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-16 13:54:46,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 233. [2022-02-16 13:54:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.603448275862069) internal successors, (604), 232 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 604 transitions. [2022-02-16 13:54:46,219 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 604 transitions. Word has length 20 [2022-02-16 13:54:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:46,219 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 604 transitions. [2022-02-16 13:54:46,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 604 transitions. [2022-02-16 13:54:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:46,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:46,220 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:46,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Ended with exit code 0 [2022-02-16 13:54:46,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:46,420 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:46,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2017615242, now seen corresponding path program 392 times [2022-02-16 13:54:46,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:46,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200470088] [2022-02-16 13:54:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:46,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:46,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:46,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200470088] [2022-02-16 13:54:46,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200470088] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:46,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792861161] [2022-02-16 13:54:46,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:46,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:46,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:46,501 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:46,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-02-16 13:54:46,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:46,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:46,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:46,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:46,978 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:46,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:46,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792861161] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:46,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:46,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:54:46,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989962708] [2022-02-16 13:54:46,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:46,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:54:46,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:54:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:54:46,983 INFO L87 Difference]: Start difference. First operand 233 states and 604 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:47,219 INFO L93 Difference]: Finished difference Result 389 states and 908 transitions. [2022-02-16 13:54:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:47,220 INFO L225 Difference]: With dead ends: 389 [2022-02-16 13:54:47,220 INFO L226 Difference]: Without dead ends: 389 [2022-02-16 13:54:47,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:47,220 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:47,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 119 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:54:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-16 13:54:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 231. [2022-02-16 13:54:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.5956521739130434) internal successors, (597), 230 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 597 transitions. [2022-02-16 13:54:47,223 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 597 transitions. Word has length 20 [2022-02-16 13:54:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:47,223 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 597 transitions. [2022-02-16 13:54:47,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 597 transitions. [2022-02-16 13:54:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:47,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:47,223 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:47,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:47,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:47,440 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:47,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1554714810, now seen corresponding path program 393 times [2022-02-16 13:54:47,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:47,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576290718] [2022-02-16 13:54:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:47,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:47,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:47,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576290718] [2022-02-16 13:54:47,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576290718] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:47,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48934950] [2022-02-16 13:54:47,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:54:47,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:47,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:47,518 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:47,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-02-16 13:54:47,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:54:47,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:47,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:47,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:47,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:54:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:47,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:48,076 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:48,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:48,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48934950] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:48,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:48,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:54:48,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899533446] [2022-02-16 13:54:48,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:48,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:54:48,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:48,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:54:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:54:48,081 INFO L87 Difference]: Start difference. First operand 231 states and 597 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:48,361 INFO L93 Difference]: Finished difference Result 332 states and 788 transitions. [2022-02-16 13:54:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:48,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:48,362 INFO L225 Difference]: With dead ends: 332 [2022-02-16 13:54:48,362 INFO L226 Difference]: Without dead ends: 330 [2022-02-16 13:54:48,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:54:48,362 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:48,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 128 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:54:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-16 13:54:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 238. [2022-02-16 13:54:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5991561181434597) internal successors, (616), 237 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 616 transitions. [2022-02-16 13:54:48,365 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 616 transitions. Word has length 20 [2022-02-16 13:54:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:48,365 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 616 transitions. [2022-02-16 13:54:48,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 616 transitions. [2022-02-16 13:54:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:48,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:48,365 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:48,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:48,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:48,570 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1625154690, now seen corresponding path program 394 times [2022-02-16 13:54:48,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:48,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404571297] [2022-02-16 13:54:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:48,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:48,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:48,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404571297] [2022-02-16 13:54:48,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404571297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:48,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048240794] [2022-02-16 13:54:48,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:54:48,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:48,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:48,656 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:48,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-02-16 13:54:48,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:54:48,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:48,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:49,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:54:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:49,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:49,230 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:49,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:49,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048240794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:49,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:49,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:54:49,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136111829] [2022-02-16 13:54:49,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:49,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:54:49,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:54:49,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:54:49,235 INFO L87 Difference]: Start difference. First operand 238 states and 616 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:49,526 INFO L93 Difference]: Finished difference Result 334 states and 794 transitions. [2022-02-16 13:54:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:54:49,526 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:49,526 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:54:49,526 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 13:54:49,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:54:49,526 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:49,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 100 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:54:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 13:54:49,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 237. [2022-02-16 13:54:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.597457627118644) internal successors, (613), 236 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 613 transitions. [2022-02-16 13:54:49,529 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 613 transitions. Word has length 20 [2022-02-16 13:54:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:49,529 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 613 transitions. [2022-02-16 13:54:49,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 613 transitions. [2022-02-16 13:54:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:49,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:49,530 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:49,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-02-16 13:54:49,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:49,743 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:49,744 INFO L85 PathProgramCache]: Analyzing trace with hash -142019752, now seen corresponding path program 395 times [2022-02-16 13:54:49,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:49,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887651152] [2022-02-16 13:54:49,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:49,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:49,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:49,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887651152] [2022-02-16 13:54:49,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887651152] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:49,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096178545] [2022-02-16 13:54:49,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:54:49,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:49,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:49,818 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:49,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-02-16 13:54:50,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:54:50,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:50,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:50,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:50,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:50,400 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:50,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:50,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096178545] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:50,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:50,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:54:50,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864924281] [2022-02-16 13:54:50,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:50,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:54:50,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:54:50,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:54:50,405 INFO L87 Difference]: Start difference. First operand 237 states and 613 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:50,695 INFO L93 Difference]: Finished difference Result 321 states and 781 transitions. [2022-02-16 13:54:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:50,696 INFO L225 Difference]: With dead ends: 321 [2022-02-16 13:54:50,696 INFO L226 Difference]: Without dead ends: 321 [2022-02-16 13:54:50,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:54:50,696 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 80 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:50,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 126 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:50,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-16 13:54:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 236. [2022-02-16 13:54:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.595744680851064) internal successors, (610), 235 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 610 transitions. [2022-02-16 13:54:50,699 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 610 transitions. Word has length 20 [2022-02-16 13:54:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:50,699 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 610 transitions. [2022-02-16 13:54:50,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 610 transitions. [2022-02-16 13:54:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:50,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:50,699 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:50,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:50,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:50,916 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:50,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:50,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2040518914, now seen corresponding path program 396 times [2022-02-16 13:54:50,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:50,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996839047] [2022-02-16 13:54:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:50,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:51,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:51,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996839047] [2022-02-16 13:54:51,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996839047] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:51,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019184642] [2022-02-16 13:54:51,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:54:51,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:51,003 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:51,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-02-16 13:54:51,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:54:51,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:51,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:51,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:51,624 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:54:51,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-02-16 13:54:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:51,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019184642] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:51,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:51,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:54:51,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714778669] [2022-02-16 13:54:51,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:51,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:54:51,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:54:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:54:51,629 INFO L87 Difference]: Start difference. First operand 236 states and 610 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:51,957 INFO L93 Difference]: Finished difference Result 331 states and 792 transitions. [2022-02-16 13:54:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:51,958 INFO L225 Difference]: With dead ends: 331 [2022-02-16 13:54:51,958 INFO L226 Difference]: Without dead ends: 331 [2022-02-16 13:54:51,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:54:51,958 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:51,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 171 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-16 13:54:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 232. [2022-02-16 13:54:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.593073593073593) internal successors, (599), 231 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 599 transitions. [2022-02-16 13:54:51,961 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 599 transitions. Word has length 20 [2022-02-16 13:54:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:51,961 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 599 transitions. [2022-02-16 13:54:51,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 599 transitions. [2022-02-16 13:54:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:51,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:51,962 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:51,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:52,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2022-02-16 13:54:52,167 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash -255217124, now seen corresponding path program 397 times [2022-02-16 13:54:52,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:52,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907486160] [2022-02-16 13:54:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:52,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:52,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:52,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907486160] [2022-02-16 13:54:52,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907486160] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:52,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118399352] [2022-02-16 13:54:52,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:54:52,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:52,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:52,277 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:52,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-02-16 13:54:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:52,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:52,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:52,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:54:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:52,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:53,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:53,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:54:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:53,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118399352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:53,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:53,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-02-16 13:54:53,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422847176] [2022-02-16 13:54:53,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:53,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 13:54:53,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:53,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 13:54:53,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:54:53,158 INFO L87 Difference]: Start difference. First operand 232 states and 599 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:53,622 INFO L93 Difference]: Finished difference Result 268 states and 673 transitions. [2022-02-16 13:54:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:54:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:53,623 INFO L225 Difference]: With dead ends: 268 [2022-02-16 13:54:53,623 INFO L226 Difference]: Without dead ends: 268 [2022-02-16 13:54:53,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:54:53,623 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:53,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 98 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-02-16 13:54:53,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2022-02-16 13:54:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.611814345991561) internal successors, (619), 237 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 619 transitions. [2022-02-16 13:54:53,626 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 619 transitions. Word has length 20 [2022-02-16 13:54:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:53,626 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 619 transitions. [2022-02-16 13:54:53,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 619 transitions. [2022-02-16 13:54:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:53,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:53,626 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:53,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-02-16 13:54:53,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-02-16 13:54:53,843 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash 459315732, now seen corresponding path program 398 times [2022-02-16 13:54:53,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:53,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678400746] [2022-02-16 13:54:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:53,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:53,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:53,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678400746] [2022-02-16 13:54:53,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678400746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:53,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434568637] [2022-02-16 13:54:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:54:53,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:53,953 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:53,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-02-16 13:54:54,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:54,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:54,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:54,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:54,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:54:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:54,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:54,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:54,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:54:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:54,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434568637] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:54,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:54,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:54,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535844932] [2022-02-16 13:54:54,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:54,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:54,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:54,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:54,601 INFO L87 Difference]: Start difference. First operand 238 states and 619 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:55,019 INFO L93 Difference]: Finished difference Result 269 states and 673 transitions. [2022-02-16 13:54:55,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:54:55,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:55,019 INFO L225 Difference]: With dead ends: 269 [2022-02-16 13:54:55,020 INFO L226 Difference]: Without dead ends: 268 [2022-02-16 13:54:55,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:54:55,020 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:55,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 96 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-02-16 13:54:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 237. [2022-02-16 13:54:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.610169491525424) internal successors, (616), 236 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 616 transitions. [2022-02-16 13:54:55,022 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 616 transitions. Word has length 20 [2022-02-16 13:54:55,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:55,022 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 616 transitions. [2022-02-16 13:54:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 616 transitions. [2022-02-16 13:54:55,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:55,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:55,023 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:55,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-02-16 13:54:55,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-02-16 13:54:55,223 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1047061054, now seen corresponding path program 399 times [2022-02-16 13:54:55,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:55,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279457121] [2022-02-16 13:54:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:55,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:55,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:55,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279457121] [2022-02-16 13:54:55,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279457121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:55,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602635149] [2022-02-16 13:54:55,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:54:55,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:55,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:55,342 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:55,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-02-16 13:54:55,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:54:55,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:55,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:55,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:55,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:54:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:55,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:56,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:56,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:54:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:56,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602635149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:56,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:56,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:54:56,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939596393] [2022-02-16 13:54:56,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:56,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:54:56,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:56,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:54:56,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:54:56,185 INFO L87 Difference]: Start difference. First operand 237 states and 616 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:56,645 INFO L93 Difference]: Finished difference Result 256 states and 656 transitions. [2022-02-16 13:54:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:54:56,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:56,645 INFO L225 Difference]: With dead ends: 256 [2022-02-16 13:54:56,645 INFO L226 Difference]: Without dead ends: 254 [2022-02-16 13:54:56,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:54:56,646 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:56,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 92 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-16 13:54:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 235. [2022-02-16 13:54:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6153846153846154) internal successors, (612), 234 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 612 transitions. [2022-02-16 13:54:56,648 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 612 transitions. Word has length 20 [2022-02-16 13:54:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:56,648 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 612 transitions. [2022-02-16 13:54:56,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 612 transitions. [2022-02-16 13:54:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:56,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:56,649 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:56,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:56,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-02-16 13:54:56,849 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1906908128, now seen corresponding path program 400 times [2022-02-16 13:54:56,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:56,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632439989] [2022-02-16 13:54:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:56,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:56,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:56,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632439989] [2022-02-16 13:54:56,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632439989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:56,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040912521] [2022-02-16 13:54:56,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:54:56,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:56,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:56,974 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:56,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-02-16 13:54:57,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:54:57,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:57,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:57,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:57,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:54:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:57,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:57,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:57,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:54:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:57,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040912521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:57,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:57,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:54:57,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960766329] [2022-02-16 13:54:57,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:57,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:54:57,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:54:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:54:57,718 INFO L87 Difference]: Start difference. First operand 235 states and 612 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:58,284 INFO L93 Difference]: Finished difference Result 309 states and 739 transitions. [2022-02-16 13:54:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:54:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:58,285 INFO L225 Difference]: With dead ends: 309 [2022-02-16 13:54:58,285 INFO L226 Difference]: Without dead ends: 309 [2022-02-16 13:54:58,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:54:58,285 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:58,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 115 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-16 13:54:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 241. [2022-02-16 13:54:58,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6333333333333333) internal successors, (632), 240 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 632 transitions. [2022-02-16 13:54:58,288 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 632 transitions. Word has length 20 [2022-02-16 13:54:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:58,288 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 632 transitions. [2022-02-16 13:54:58,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 632 transitions. [2022-02-16 13:54:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:58,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:58,288 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:58,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Forceful destruction successful, exit code 0 [2022-02-16 13:54:58,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2022-02-16 13:54:58,503 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:54:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:54:58,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1673526312, now seen corresponding path program 401 times [2022-02-16 13:54:58,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:54:58,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926338378] [2022-02-16 13:54:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:54:58,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:54:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:54:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:58,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:54:58,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926338378] [2022-02-16 13:54:58,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926338378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:54:58,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589348157] [2022-02-16 13:54:58,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:54:58,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:54:58,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:54:58,590 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:54:58,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-02-16 13:54:58,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:54:58,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:54:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:54:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:54:59,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 83 [2022-02-16 13:54:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:59,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:54:59,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:54:59,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:54:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:54:59,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589348157] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:54:59,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:54:59,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:54:59,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473674660] [2022-02-16 13:54:59,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:54:59,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:54:59,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:54:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:54:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:54:59,357 INFO L87 Difference]: Start difference. First operand 241 states and 632 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:54:59,863 INFO L93 Difference]: Finished difference Result 319 states and 747 transitions. [2022-02-16 13:54:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:54:59,863 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:54:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:54:59,864 INFO L225 Difference]: With dead ends: 319 [2022-02-16 13:54:59,864 INFO L226 Difference]: Without dead ends: 318 [2022-02-16 13:54:59,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:54:59,864 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 135 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:54:59,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 167 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:54:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-16 13:54:59,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 238. [2022-02-16 13:54:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.632911392405063) internal successors, (624), 237 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 624 transitions. [2022-02-16 13:54:59,867 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 624 transitions. Word has length 20 [2022-02-16 13:54:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:54:59,867 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 624 transitions. [2022-02-16 13:54:59,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:54:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 624 transitions. [2022-02-16 13:54:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:54:59,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:54:59,867 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:54:59,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:00,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:00,084 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:00,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2115201436, now seen corresponding path program 402 times [2022-02-16 13:55:00,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:00,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749408888] [2022-02-16 13:55:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:00,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:00,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:00,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749408888] [2022-02-16 13:55:00,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749408888] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:00,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314123545] [2022-02-16 13:55:00,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:55:00,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:00,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:00,200 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:00,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-02-16 13:55:00,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:55:00,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:00,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:55:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:00,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:00,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:00,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:00,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314123545] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:00,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:00,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:00,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462865432] [2022-02-16 13:55:00,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:00,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:00,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:00,985 INFO L87 Difference]: Start difference. First operand 238 states and 624 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:01,564 INFO L93 Difference]: Finished difference Result 309 states and 740 transitions. [2022-02-16 13:55:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:55:01,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:01,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:01,565 INFO L225 Difference]: With dead ends: 309 [2022-02-16 13:55:01,565 INFO L226 Difference]: Without dead ends: 309 [2022-02-16 13:55:01,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:55:01,565 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 141 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:01,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 137 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-16 13:55:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 238. [2022-02-16 13:55:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6413502109704643) internal successors, (626), 237 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 626 transitions. [2022-02-16 13:55:01,568 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 626 transitions. Word has length 20 [2022-02-16 13:55:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:01,568 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 626 transitions. [2022-02-16 13:55:01,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 626 transitions. [2022-02-16 13:55:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:01,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:01,569 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:01,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Ended with exit code 0 [2022-02-16 13:55:01,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2022-02-16 13:55:01,769 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:01,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1490043936, now seen corresponding path program 403 times [2022-02-16 13:55:01,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:01,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976529319] [2022-02-16 13:55:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:01,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:01,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:01,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976529319] [2022-02-16 13:55:01,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976529319] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:01,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793550355] [2022-02-16 13:55:01,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:55:01,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:01,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:01,913 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:01,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-02-16 13:55:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:02,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:02,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:55:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:02,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:02,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:02,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:02,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793550355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:02,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:02,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:02,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630708469] [2022-02-16 13:55:02,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:02,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:02,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:02,827 INFO L87 Difference]: Start difference. First operand 238 states and 626 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:03,385 INFO L93 Difference]: Finished difference Result 296 states and 721 transitions. [2022-02-16 13:55:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:55:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:03,385 INFO L225 Difference]: With dead ends: 296 [2022-02-16 13:55:03,385 INFO L226 Difference]: Without dead ends: 296 [2022-02-16 13:55:03,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:55:03,386 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:03,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 151 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-16 13:55:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 236. [2022-02-16 13:55:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.625531914893617) internal successors, (617), 235 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 617 transitions. [2022-02-16 13:55:03,388 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 617 transitions. Word has length 20 [2022-02-16 13:55:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:03,388 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 617 transitions. [2022-02-16 13:55:03,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 617 transitions. [2022-02-16 13:55:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:03,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:03,389 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:03,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:03,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2022-02-16 13:55:03,595 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash 162748116, now seen corresponding path program 404 times [2022-02-16 13:55:03,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:03,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848178484] [2022-02-16 13:55:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:03,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:03,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:03,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848178484] [2022-02-16 13:55:03,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848178484] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:03,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476436399] [2022-02-16 13:55:03,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:55:03,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:03,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:03,682 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:03,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-02-16 13:55:03,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:55:03,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:04,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:55:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:04,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:04,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:04,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:04,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476436399] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:04,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:04,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:55:04,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980485382] [2022-02-16 13:55:04,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:04,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:55:04,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:55:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:55:04,339 INFO L87 Difference]: Start difference. First operand 236 states and 617 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:04,657 INFO L93 Difference]: Finished difference Result 300 states and 727 transitions. [2022-02-16 13:55:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:55:04,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:04,658 INFO L225 Difference]: With dead ends: 300 [2022-02-16 13:55:04,658 INFO L226 Difference]: Without dead ends: 298 [2022-02-16 13:55:04,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:55:04,658 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:04,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 146 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-16 13:55:04,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 239. [2022-02-16 13:55:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6218487394957983) internal successors, (624), 238 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 624 transitions. [2022-02-16 13:55:04,661 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 624 transitions. Word has length 20 [2022-02-16 13:55:04,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:04,661 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 624 transitions. [2022-02-16 13:55:04,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 624 transitions. [2022-02-16 13:55:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:04,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:04,662 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:04,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:04,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:04,879 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1277845912, now seen corresponding path program 405 times [2022-02-16 13:55:04,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:04,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156063329] [2022-02-16 13:55:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:04,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:04,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:04,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156063329] [2022-02-16 13:55:04,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156063329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:04,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662742085] [2022-02-16 13:55:04,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:55:04,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:04,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:04,968 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:04,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-02-16 13:55:05,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:55:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:05,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:05,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:55:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:05,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:05,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:05,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:05,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662742085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:05,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:05,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:05,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780643542] [2022-02-16 13:55:05,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:05,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:05,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:05,798 INFO L87 Difference]: Start difference. First operand 239 states and 624 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:06,330 INFO L93 Difference]: Finished difference Result 289 states and 717 transitions. [2022-02-16 13:55:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:55:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:06,331 INFO L225 Difference]: With dead ends: 289 [2022-02-16 13:55:06,331 INFO L226 Difference]: Without dead ends: 289 [2022-02-16 13:55:06,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:55:06,331 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:06,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 122 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-16 13:55:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 235. [2022-02-16 13:55:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6153846153846154) internal successors, (612), 234 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 612 transitions. [2022-02-16 13:55:06,334 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 612 transitions. Word has length 20 [2022-02-16 13:55:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:06,334 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 612 transitions. [2022-02-16 13:55:06,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 612 transitions. [2022-02-16 13:55:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:06,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:06,334 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:06,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-02-16 13:55:06,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2022-02-16 13:55:06,536 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:06,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2136993474, now seen corresponding path program 406 times [2022-02-16 13:55:06,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:06,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970514046] [2022-02-16 13:55:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:06,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:06,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:06,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970514046] [2022-02-16 13:55:06,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970514046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:06,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657120795] [2022-02-16 13:55:06,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:55:06,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:06,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:06,644 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:06,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-02-16 13:55:06,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:55:06,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:06,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:07,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:55:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:07,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:07,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:07,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:07,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657120795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:07,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:07,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:55:07,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426259066] [2022-02-16 13:55:07,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:07,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:55:07,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:07,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:55:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:55:07,324 INFO L87 Difference]: Start difference. First operand 235 states and 612 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:07,720 INFO L93 Difference]: Finished difference Result 258 states and 659 transitions. [2022-02-16 13:55:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:07,720 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:07,721 INFO L225 Difference]: With dead ends: 258 [2022-02-16 13:55:07,721 INFO L226 Difference]: Without dead ends: 255 [2022-02-16 13:55:07,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:55:07,721 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:07,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 83 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-16 13:55:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 236. [2022-02-16 13:55:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6127659574468085) internal successors, (614), 235 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 614 transitions. [2022-02-16 13:55:07,724 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 614 transitions. Word has length 20 [2022-02-16 13:55:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:07,724 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 614 transitions. [2022-02-16 13:55:07,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 614 transitions. [2022-02-16 13:55:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:07,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:07,724 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:07,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:07,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:07,925 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1949680514, now seen corresponding path program 407 times [2022-02-16 13:55:07,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:07,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682839078] [2022-02-16 13:55:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:07,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:08,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:08,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682839078] [2022-02-16 13:55:08,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682839078] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:08,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942919363] [2022-02-16 13:55:08,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:55:08,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:08,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:08,063 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:08,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-02-16 13:55:08,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:55:08,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:08,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:08,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:55:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:08,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:08,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:08,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:08,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942919363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:08,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:08,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:55:08,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887723912] [2022-02-16 13:55:08,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:08,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:55:08,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:55:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:55:08,915 INFO L87 Difference]: Start difference. First operand 236 states and 614 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:09,323 INFO L93 Difference]: Finished difference Result 271 states and 676 transitions. [2022-02-16 13:55:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:55:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:09,323 INFO L225 Difference]: With dead ends: 271 [2022-02-16 13:55:09,324 INFO L226 Difference]: Without dead ends: 269 [2022-02-16 13:55:09,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:55:09,324 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:09,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 110 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-16 13:55:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2022-02-16 13:55:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6092436974789917) internal successors, (621), 238 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 621 transitions. [2022-02-16 13:55:09,326 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 621 transitions. Word has length 20 [2022-02-16 13:55:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:09,326 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 621 transitions. [2022-02-16 13:55:09,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 621 transitions. [2022-02-16 13:55:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:09,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:09,327 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:09,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:09,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2022-02-16 13:55:09,535 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash -834582718, now seen corresponding path program 408 times [2022-02-16 13:55:09,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:09,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474019259] [2022-02-16 13:55:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:09,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:09,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:09,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474019259] [2022-02-16 13:55:09,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474019259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:09,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461563868] [2022-02-16 13:55:09,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:55:09,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:09,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:09,637 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:09,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-02-16 13:55:09,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:55:09,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:09,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:10,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:55:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:10,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:10,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:10,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:10,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461563868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:10,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:10,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:10,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251710903] [2022-02-16 13:55:10,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:10,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:10,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:10,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:10,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:10,393 INFO L87 Difference]: Start difference. First operand 239 states and 621 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:10,721 INFO L93 Difference]: Finished difference Result 258 states and 662 transitions. [2022-02-16 13:55:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:10,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:10,722 INFO L225 Difference]: With dead ends: 258 [2022-02-16 13:55:10,722 INFO L226 Difference]: Without dead ends: 258 [2022-02-16 13:55:10,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:55:10,722 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:10,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 121 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-16 13:55:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 234. [2022-02-16 13:55:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6051502145922747) internal successors, (607), 233 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 607 transitions. [2022-02-16 13:55:10,724 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 607 transitions. Word has length 20 [2022-02-16 13:55:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:10,725 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 607 transitions. [2022-02-16 13:55:10,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 607 transitions. [2022-02-16 13:55:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:10,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:10,725 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:10,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:10,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:10,940 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:10,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1270441274, now seen corresponding path program 409 times [2022-02-16 13:55:10,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:10,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232275115] [2022-02-16 13:55:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:10,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:11,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:11,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232275115] [2022-02-16 13:55:11,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232275115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:11,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97803745] [2022-02-16 13:55:11,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:55:11,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:11,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:11,023 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:11,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-02-16 13:55:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:11,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:11,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:55:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:11,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:11,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:11,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:11,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97803745] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:11,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:11,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:11,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642752006] [2022-02-16 13:55:11,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:11,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:11,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:11,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:11,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:11,760 INFO L87 Difference]: Start difference. First operand 234 states and 607 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:12,238 INFO L93 Difference]: Finished difference Result 297 states and 729 transitions. [2022-02-16 13:55:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:55:12,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:12,239 INFO L225 Difference]: With dead ends: 297 [2022-02-16 13:55:12,239 INFO L226 Difference]: Without dead ends: 297 [2022-02-16 13:55:12,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:55:12,239 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:12,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 153 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-16 13:55:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 242. [2022-02-16 13:55:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6390041493775933) internal successors, (636), 241 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 636 transitions. [2022-02-16 13:55:12,242 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 636 transitions. Word has length 20 [2022-02-16 13:55:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:12,242 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 636 transitions. [2022-02-16 13:55:12,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 636 transitions. [2022-02-16 13:55:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:12,242 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:12,242 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:12,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Ended with exit code 0 [2022-02-16 13:55:12,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-02-16 13:55:12,455 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:12,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1984974130, now seen corresponding path program 410 times [2022-02-16 13:55:12,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:12,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428870141] [2022-02-16 13:55:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:12,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:12,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:12,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428870141] [2022-02-16 13:55:12,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428870141] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:12,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822874685] [2022-02-16 13:55:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:55:12,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:12,554 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:12,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-02-16 13:55:12,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:55:12,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:12,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:12,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:12,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:55:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:13,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:13,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:13,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:13,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822874685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:13,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:13,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:55:13,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319790753] [2022-02-16 13:55:13,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:13,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:55:13,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:13,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:55:13,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:55:13,231 INFO L87 Difference]: Start difference. First operand 242 states and 636 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:13,549 INFO L93 Difference]: Finished difference Result 307 states and 737 transitions. [2022-02-16 13:55:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:55:13,549 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:13,549 INFO L225 Difference]: With dead ends: 307 [2022-02-16 13:55:13,549 INFO L226 Difference]: Without dead ends: 306 [2022-02-16 13:55:13,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:55:13,550 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:13,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 166 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-02-16 13:55:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 239. [2022-02-16 13:55:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.638655462184874) internal successors, (628), 238 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 628 transitions. [2022-02-16 13:55:13,553 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 628 transitions. Word has length 20 [2022-02-16 13:55:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:13,553 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 628 transitions. [2022-02-16 13:55:13,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 628 transitions. [2022-02-16 13:55:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:13,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:13,553 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:13,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-02-16 13:55:13,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2022-02-16 13:55:13,756 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:13,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1478734582, now seen corresponding path program 411 times [2022-02-16 13:55:13,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:13,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524310642] [2022-02-16 13:55:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:13,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:13,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:13,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524310642] [2022-02-16 13:55:13,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524310642] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:13,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723350452] [2022-02-16 13:55:13,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:55:13,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:13,849 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:13,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-02-16 13:55:14,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:55:14,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:14,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:14,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:14,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:55:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:14,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:14,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:14,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:14,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723350452] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:14,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:14,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:14,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090272839] [2022-02-16 13:55:14,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:14,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:14,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:14,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:14,543 INFO L87 Difference]: Start difference. First operand 239 states and 628 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:14,923 INFO L93 Difference]: Finished difference Result 324 states and 772 transitions. [2022-02-16 13:55:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:55:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:14,924 INFO L225 Difference]: With dead ends: 324 [2022-02-16 13:55:14,924 INFO L226 Difference]: Without dead ends: 324 [2022-02-16 13:55:14,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:55:14,924 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:14,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 152 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-16 13:55:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 241. [2022-02-16 13:55:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.654166666666667) internal successors, (637), 240 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 637 transitions. [2022-02-16 13:55:14,927 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 637 transitions. Word has length 20 [2022-02-16 13:55:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:14,927 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 637 transitions. [2022-02-16 13:55:14,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 637 transitions. [2022-02-16 13:55:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:14,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:14,927 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:14,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:15,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:15,142 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:15,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2126510790, now seen corresponding path program 412 times [2022-02-16 13:55:15,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:15,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379616263] [2022-02-16 13:55:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:15,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:15,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:15,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379616263] [2022-02-16 13:55:15,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379616263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:15,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137606128] [2022-02-16 13:55:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:55:15,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:15,237 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:15,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-02-16 13:55:15,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:55:15,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:15,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:15,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:15,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:55:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:15,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:15,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:15,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:16,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137606128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:16,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:16,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:16,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731546469] [2022-02-16 13:55:16,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:16,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:16,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:16,060 INFO L87 Difference]: Start difference. First operand 241 states and 637 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:16,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:16,541 INFO L93 Difference]: Finished difference Result 322 states and 769 transitions. [2022-02-16 13:55:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:55:16,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:16,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:16,542 INFO L225 Difference]: With dead ends: 322 [2022-02-16 13:55:16,542 INFO L226 Difference]: Without dead ends: 322 [2022-02-16 13:55:16,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:55:16,542 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 135 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:16,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 146 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-16 13:55:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 239. [2022-02-16 13:55:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.638655462184874) internal successors, (628), 238 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 628 transitions. [2022-02-16 13:55:16,545 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 628 transitions. Word has length 20 [2022-02-16 13:55:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:16,545 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 628 transitions. [2022-02-16 13:55:16,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 628 transitions. [2022-02-16 13:55:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:16,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:16,545 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:16,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-02-16 13:55:16,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2022-02-16 13:55:16,762 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash -473718738, now seen corresponding path program 413 times [2022-02-16 13:55:16,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:16,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694443005] [2022-02-16 13:55:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:16,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:16,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:16,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694443005] [2022-02-16 13:55:16,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694443005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:16,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119540433] [2022-02-16 13:55:16,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:55:16,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:16,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:16,857 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:16,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-02-16 13:55:17,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:55:17,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:17,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:17,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:17,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:55:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:17,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:17,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:17,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:17,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119540433] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:17,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:17,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:55:17,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037076310] [2022-02-16 13:55:17,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:17,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:55:17,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:55:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:55:17,703 INFO L87 Difference]: Start difference. First operand 239 states and 628 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:18,058 INFO L93 Difference]: Finished difference Result 323 states and 768 transitions. [2022-02-16 13:55:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:55:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:18,058 INFO L225 Difference]: With dead ends: 323 [2022-02-16 13:55:18,058 INFO L226 Difference]: Without dead ends: 321 [2022-02-16 13:55:18,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:55:18,059 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 146 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:18,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 109 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-16 13:55:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2022-02-16 13:55:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6348547717842323) internal successors, (635), 241 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 635 transitions. [2022-02-16 13:55:18,061 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 635 transitions. Word has length 20 [2022-02-16 13:55:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:18,061 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 635 transitions. [2022-02-16 13:55:18,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 635 transitions. [2022-02-16 13:55:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:18,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:18,062 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:18,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:18,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2022-02-16 13:55:18,275 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash 641379058, now seen corresponding path program 414 times [2022-02-16 13:55:18,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:18,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80228533] [2022-02-16 13:55:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:18,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:18,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:18,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80228533] [2022-02-16 13:55:18,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80228533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:18,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128393712] [2022-02-16 13:55:18,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:55:18,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:18,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:18,392 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:18,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-02-16 13:55:18,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:55:18,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:18,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:18,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:18,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:55:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:19,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:19,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:19,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:19,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128393712] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:19,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:19,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:19,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199463437] [2022-02-16 13:55:19,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:19,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:19,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:19,277 INFO L87 Difference]: Start difference. First operand 242 states and 635 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:19,755 INFO L93 Difference]: Finished difference Result 316 states and 766 transitions. [2022-02-16 13:55:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:55:19,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:19,755 INFO L225 Difference]: With dead ends: 316 [2022-02-16 13:55:19,756 INFO L226 Difference]: Without dead ends: 316 [2022-02-16 13:55:19,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:55:19,756 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 102 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:19,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 155 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-16 13:55:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 240. [2022-02-16 13:55:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6276150627615062) internal successors, (628), 239 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 628 transitions. [2022-02-16 13:55:19,759 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 628 transitions. Word has length 20 [2022-02-16 13:55:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:19,759 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 628 transitions. [2022-02-16 13:55:19,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 628 transitions. [2022-02-16 13:55:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:19,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:19,759 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:19,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:19,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:19,959 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:19,960 INFO L85 PathProgramCache]: Analyzing trace with hash 211277404, now seen corresponding path program 415 times [2022-02-16 13:55:19,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:19,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500288895] [2022-02-16 13:55:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:19,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:20,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:20,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500288895] [2022-02-16 13:55:20,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500288895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:20,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911553946] [2022-02-16 13:55:20,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:55:20,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:20,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:20,106 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:20,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-02-16 13:55:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:20,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:20,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:55:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:20,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:20,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:20,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:21,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911553946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:21,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:21,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:21,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594672533] [2022-02-16 13:55:21,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:21,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:21,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:21,034 INFO L87 Difference]: Start difference. First operand 240 states and 628 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:21,452 INFO L93 Difference]: Finished difference Result 293 states and 728 transitions. [2022-02-16 13:55:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:55:21,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:21,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:21,453 INFO L225 Difference]: With dead ends: 293 [2022-02-16 13:55:21,453 INFO L226 Difference]: Without dead ends: 293 [2022-02-16 13:55:21,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:55:21,453 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:21,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 119 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-16 13:55:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 241. [2022-02-16 13:55:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6333333333333333) internal successors, (632), 240 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 632 transitions. [2022-02-16 13:55:21,456 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 632 transitions. Word has length 20 [2022-02-16 13:55:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:21,456 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 632 transitions. [2022-02-16 13:55:21,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 632 transitions. [2022-02-16 13:55:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:21,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:21,457 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:21,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Ended with exit code 0 [2022-02-16 13:55:21,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2022-02-16 13:55:21,659 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash 900999328, now seen corresponding path program 416 times [2022-02-16 13:55:21,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:21,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296388508] [2022-02-16 13:55:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:21,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:21,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:21,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296388508] [2022-02-16 13:55:21,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296388508] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:21,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9593259] [2022-02-16 13:55:21,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:55:21,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:21,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:21,798 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:21,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-02-16 13:55:22,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:55:22,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:22,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:22,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:22,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:55:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:22,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:22,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:22,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:22,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9593259] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:22,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:22,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:22,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538754277] [2022-02-16 13:55:22,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:22,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:22,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:22,583 INFO L87 Difference]: Start difference. First operand 241 states and 632 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:22,922 INFO L93 Difference]: Finished difference Result 300 states and 734 transitions. [2022-02-16 13:55:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:55:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:22,923 INFO L225 Difference]: With dead ends: 300 [2022-02-16 13:55:22,923 INFO L226 Difference]: Without dead ends: 300 [2022-02-16 13:55:22,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:55:22,923 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 121 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:22,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 142 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-16 13:55:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 237. [2022-02-16 13:55:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6186440677966103) internal successors, (618), 236 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 618 transitions. [2022-02-16 13:55:22,927 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 618 transitions. Word has length 20 [2022-02-16 13:55:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:22,927 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 618 transitions. [2022-02-16 13:55:22,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 618 transitions. [2022-02-16 13:55:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:22,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:22,927 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:22,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:23,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:23,146 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash 605572146, now seen corresponding path program 417 times [2022-02-16 13:55:23,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:23,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26340147] [2022-02-16 13:55:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:23,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:23,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:23,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26340147] [2022-02-16 13:55:23,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26340147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:23,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580348432] [2022-02-16 13:55:23,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:55:23,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:23,234 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:23,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-02-16 13:55:23,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:55:23,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:23,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:23,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:23,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:23,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:23,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580348432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:23,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:23,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:23,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138946019] [2022-02-16 13:55:23,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:23,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:23,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:23,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:23,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:23,825 INFO L87 Difference]: Start difference. First operand 237 states and 618 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:24,022 INFO L93 Difference]: Finished difference Result 261 states and 670 transitions. [2022-02-16 13:55:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:24,023 INFO L225 Difference]: With dead ends: 261 [2022-02-16 13:55:24,023 INFO L226 Difference]: Without dead ends: 261 [2022-02-16 13:55:24,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:55:24,023 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:24,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 97 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:24,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-16 13:55:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 235. [2022-02-16 13:55:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.611111111111111) internal successors, (611), 234 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 611 transitions. [2022-02-16 13:55:24,026 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 611 transitions. Word has length 20 [2022-02-16 13:55:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:24,026 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 611 transitions. [2022-02-16 13:55:24,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 611 transitions. [2022-02-16 13:55:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:24,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:24,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:24,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Ended with exit code 0 [2022-02-16 13:55:24,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2022-02-16 13:55:24,243 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 441362750, now seen corresponding path program 418 times [2022-02-16 13:55:24,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:24,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123018382] [2022-02-16 13:55:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:24,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:24,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:24,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123018382] [2022-02-16 13:55:24,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123018382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:24,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201240231] [2022-02-16 13:55:24,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:55:24,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:24,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:24,340 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:24,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-02-16 13:55:24,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:55:24,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:24,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:24,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:24,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:55:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:24,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:25,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:25,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:25,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201240231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:25,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:25,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:55:25,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462952679] [2022-02-16 13:55:25,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:25,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:55:25,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:25,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:55:25,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:55:25,138 INFO L87 Difference]: Start difference. First operand 235 states and 611 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:25,449 INFO L93 Difference]: Finished difference Result 280 states and 696 transitions. [2022-02-16 13:55:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:25,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:25,449 INFO L225 Difference]: With dead ends: 280 [2022-02-16 13:55:25,449 INFO L226 Difference]: Without dead ends: 278 [2022-02-16 13:55:25,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:55:25,450 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:25,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 139 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-16 13:55:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 240. [2022-02-16 13:55:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6066945606694563) internal successors, (623), 239 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 623 transitions. [2022-02-16 13:55:25,452 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 623 transitions. Word has length 20 [2022-02-16 13:55:25,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:25,452 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 623 transitions. [2022-02-16 13:55:25,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 623 transitions. [2022-02-16 13:55:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:25,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:25,453 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:25,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Ended with exit code 0 [2022-02-16 13:55:25,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2022-02-16 13:55:25,653 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:25,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:25,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1556460546, now seen corresponding path program 419 times [2022-02-16 13:55:25,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:25,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409088713] [2022-02-16 13:55:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:25,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:25,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:25,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409088713] [2022-02-16 13:55:25,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409088713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:25,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667664011] [2022-02-16 13:55:25,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:55:25,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:25,784 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:25,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-02-16 13:55:26,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:55:26,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:26,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:26,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:55:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:26,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:26,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:26,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:26,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667664011] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:26,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:26,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:26,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582569103] [2022-02-16 13:55:26,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:26,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:26,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:26,538 INFO L87 Difference]: Start difference. First operand 240 states and 623 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:26,739 INFO L93 Difference]: Finished difference Result 282 states and 702 transitions. [2022-02-16 13:55:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:55:26,739 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:26,739 INFO L225 Difference]: With dead ends: 282 [2022-02-16 13:55:26,739 INFO L226 Difference]: Without dead ends: 282 [2022-02-16 13:55:26,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:55:26,739 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:26,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 113 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-16 13:55:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 239. [2022-02-16 13:55:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6092436974789917) internal successors, (621), 238 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 621 transitions. [2022-02-16 13:55:26,742 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 621 transitions. Word has length 20 [2022-02-16 13:55:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:26,742 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 621 transitions. [2022-02-16 13:55:26,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 621 transitions. [2022-02-16 13:55:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:26,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:26,743 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:26,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:26,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-02-16 13:55:26,950 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1255371812, now seen corresponding path program 420 times [2022-02-16 13:55:26,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:26,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894139849] [2022-02-16 13:55:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:26,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:27,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:27,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894139849] [2022-02-16 13:55:27,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894139849] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:27,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498455483] [2022-02-16 13:55:27,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:55:27,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:27,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:27,038 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:27,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-02-16 13:55:27,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:55:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:27,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:27,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:27,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:27,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498455483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:27,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:27,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:27,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374754566] [2022-02-16 13:55:27,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:27,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:27,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:27,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:27,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:27,798 INFO L87 Difference]: Start difference. First operand 239 states and 621 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:28,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:28,159 INFO L93 Difference]: Finished difference Result 267 states and 683 transitions. [2022-02-16 13:55:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:28,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:28,160 INFO L225 Difference]: With dead ends: 267 [2022-02-16 13:55:28,160 INFO L226 Difference]: Without dead ends: 267 [2022-02-16 13:55:28,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:55:28,160 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:28,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 128 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:28,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-02-16 13:55:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 234. [2022-02-16 13:55:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6051502145922747) internal successors, (607), 233 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 607 transitions. [2022-02-16 13:55:28,163 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 607 transitions. Word has length 20 [2022-02-16 13:55:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:28,163 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 607 transitions. [2022-02-16 13:55:28,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 607 transitions. [2022-02-16 13:55:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:28,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:28,163 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:28,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Ended with exit code 0 [2022-02-16 13:55:28,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-02-16 13:55:28,370 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:28,370 INFO L85 PathProgramCache]: Analyzing trace with hash 439748530, now seen corresponding path program 421 times [2022-02-16 13:55:28,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:28,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496778823] [2022-02-16 13:55:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:28,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:28,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:28,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496778823] [2022-02-16 13:55:28,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496778823] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:28,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275573494] [2022-02-16 13:55:28,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:55:28,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:28,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:28,457 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:28,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-02-16 13:55:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:28,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:28,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:28,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:55:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:28,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:29,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:29,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:29,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275573494] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:29,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:29,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:55:29,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635251599] [2022-02-16 13:55:29,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:29,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:55:29,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:29,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:55:29,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:55:29,206 INFO L87 Difference]: Start difference. First operand 234 states and 607 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:29,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:29,506 INFO L93 Difference]: Finished difference Result 253 states and 648 transitions. [2022-02-16 13:55:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:29,507 INFO L225 Difference]: With dead ends: 253 [2022-02-16 13:55:29,507 INFO L226 Difference]: Without dead ends: 250 [2022-02-16 13:55:29,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:29,507 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:29,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 64 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-16 13:55:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 236. [2022-02-16 13:55:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6) internal successors, (611), 235 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 611 transitions. [2022-02-16 13:55:29,511 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 611 transitions. Word has length 20 [2022-02-16 13:55:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:29,511 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 611 transitions. [2022-02-16 13:55:29,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 611 transitions. [2022-02-16 13:55:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:29,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:29,511 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:29,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:29,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-02-16 13:55:29,719 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash 648041838, now seen corresponding path program 422 times [2022-02-16 13:55:29,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:29,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837160632] [2022-02-16 13:55:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:29,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:29,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:29,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837160632] [2022-02-16 13:55:29,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837160632] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:29,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919753387] [2022-02-16 13:55:29,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:55:29,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:29,821 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:29,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-02-16 13:55:30,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:55:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:30,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:30,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:30,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:55:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:30,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:30,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:30,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:30,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919753387] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:30,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:30,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:55:30,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784588456] [2022-02-16 13:55:30,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:30,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:55:30,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:55:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:55:30,446 INFO L87 Difference]: Start difference. First operand 236 states and 611 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:30,680 INFO L93 Difference]: Finished difference Result 266 states and 665 transitions. [2022-02-16 13:55:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:55:30,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:30,680 INFO L225 Difference]: With dead ends: 266 [2022-02-16 13:55:30,680 INFO L226 Difference]: Without dead ends: 264 [2022-02-16 13:55:30,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:55:30,681 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:30,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 76 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-16 13:55:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2022-02-16 13:55:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.596638655462185) internal successors, (618), 238 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 618 transitions. [2022-02-16 13:55:30,683 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 618 transitions. Word has length 20 [2022-02-16 13:55:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:30,683 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 618 transitions. [2022-02-16 13:55:30,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 618 transitions. [2022-02-16 13:55:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:30,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:30,684 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:30,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:30,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2022-02-16 13:55:30,900 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1763139634, now seen corresponding path program 423 times [2022-02-16 13:55:30,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:30,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817122715] [2022-02-16 13:55:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:30,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:30,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:30,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817122715] [2022-02-16 13:55:30,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817122715] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:30,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88922598] [2022-02-16 13:55:30,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:55:30,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:30,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:30,993 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:30,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-02-16 13:55:31,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:55:31,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:31,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:31,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:31,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:55:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:31,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:31,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:31,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:55:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:31,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88922598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:31,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:31,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:55:31,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933135496] [2022-02-16 13:55:31,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:31,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:55:31,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:31,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:55:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:55:31,737 INFO L87 Difference]: Start difference. First operand 239 states and 618 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:32,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:32,006 INFO L93 Difference]: Finished difference Result 253 states and 651 transitions. [2022-02-16 13:55:32,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:32,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:32,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:32,006 INFO L225 Difference]: With dead ends: 253 [2022-02-16 13:55:32,006 INFO L226 Difference]: Without dead ends: 253 [2022-02-16 13:55:32,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:55:32,006 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:32,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 74 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-16 13:55:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 235. [2022-02-16 13:55:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6025641025641026) internal successors, (609), 234 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 609 transitions. [2022-02-16 13:55:32,009 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 609 transitions. Word has length 20 [2022-02-16 13:55:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:32,009 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 609 transitions. [2022-02-16 13:55:32,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 609 transitions. [2022-02-16 13:55:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:32,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:32,010 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:32,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:32,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:32,210 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:32,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash -619415340, now seen corresponding path program 424 times [2022-02-16 13:55:32,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:32,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324158659] [2022-02-16 13:55:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:32,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:32,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:32,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324158659] [2022-02-16 13:55:32,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324158659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:32,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068106772] [2022-02-16 13:55:32,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:55:32,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:32,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:32,303 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:32,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-02-16 13:55:32,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:55:32,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:32,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:32,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:32,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:55:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:32,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:32,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:32,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:32,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068106772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:32,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:32,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:55:32,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365731240] [2022-02-16 13:55:32,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:32,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:55:32,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:55:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:55:32,912 INFO L87 Difference]: Start difference. First operand 235 states and 609 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:33,118 INFO L93 Difference]: Finished difference Result 268 states and 669 transitions. [2022-02-16 13:55:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:33,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:33,118 INFO L225 Difference]: With dead ends: 268 [2022-02-16 13:55:33,118 INFO L226 Difference]: Without dead ends: 266 [2022-02-16 13:55:33,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:33,119 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:33,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 80 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-16 13:55:33,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 240. [2022-02-16 13:55:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.598326359832636) internal successors, (621), 239 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 621 transitions. [2022-02-16 13:55:33,121 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 621 transitions. Word has length 20 [2022-02-16 13:55:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:33,122 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 621 transitions. [2022-02-16 13:55:33,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 621 transitions. [2022-02-16 13:55:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:33,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:33,122 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:33,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-02-16 13:55:33,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:33,331 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash 495682456, now seen corresponding path program 425 times [2022-02-16 13:55:33,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:33,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076600325] [2022-02-16 13:55:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:33,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:33,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:33,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076600325] [2022-02-16 13:55:33,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076600325] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:33,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814209933] [2022-02-16 13:55:33,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:55:33,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:33,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:33,427 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:33,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-02-16 13:55:33,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:55:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:33,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:33,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:33,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:55:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:33,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:34,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:34,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:34,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814209933] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:34,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:34,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:55:34,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308436916] [2022-02-16 13:55:34,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:34,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:55:34,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:55:34,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:55:34,103 INFO L87 Difference]: Start difference. First operand 240 states and 621 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:34,371 INFO L93 Difference]: Finished difference Result 268 states and 671 transitions. [2022-02-16 13:55:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:55:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:34,372 INFO L225 Difference]: With dead ends: 268 [2022-02-16 13:55:34,372 INFO L226 Difference]: Without dead ends: 268 [2022-02-16 13:55:34,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:55:34,372 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:34,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 105 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:34,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-02-16 13:55:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 239. [2022-02-16 13:55:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.600840336134454) internal successors, (619), 238 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 619 transitions. [2022-02-16 13:55:34,375 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 619 transitions. Word has length 20 [2022-02-16 13:55:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:34,375 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 619 transitions. [2022-02-16 13:55:34,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 619 transitions. [2022-02-16 13:55:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:34,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:34,375 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:34,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Ended with exit code 0 [2022-02-16 13:55:34,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-02-16 13:55:34,579 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:34,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:34,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1978817394, now seen corresponding path program 426 times [2022-02-16 13:55:34,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:34,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145664947] [2022-02-16 13:55:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:34,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:34,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:34,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145664947] [2022-02-16 13:55:34,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145664947] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:34,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336811726] [2022-02-16 13:55:34,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:55:34,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:34,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:34,728 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:34,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-02-16 13:55:34,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:55:34,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:34,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:35,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:35,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:35,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:55:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:35,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336811726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:35,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:35,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:55:35,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768868149] [2022-02-16 13:55:35,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:35,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:55:35,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:55:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:55:35,384 INFO L87 Difference]: Start difference. First operand 239 states and 619 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:35,603 INFO L93 Difference]: Finished difference Result 256 states and 657 transitions. [2022-02-16 13:55:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:35,604 INFO L225 Difference]: With dead ends: 256 [2022-02-16 13:55:35,604 INFO L226 Difference]: Without dead ends: 256 [2022-02-16 13:55:35,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:55:35,604 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:35,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-16 13:55:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 233. [2022-02-16 13:55:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5991379310344827) internal successors, (603), 232 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 603 transitions. [2022-02-16 13:55:35,607 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 603 transitions. Word has length 20 [2022-02-16 13:55:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:35,607 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 603 transitions. [2022-02-16 13:55:35,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 603 transitions. [2022-02-16 13:55:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:35,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:35,607 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:35,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:35,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:35,815 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1548908444, now seen corresponding path program 427 times [2022-02-16 13:55:35,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:35,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266569590] [2022-02-16 13:55:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:35,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:35,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:35,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266569590] [2022-02-16 13:55:35,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266569590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:35,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297851670] [2022-02-16 13:55:35,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:55:35,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:35,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:35,953 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:35,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-02-16 13:55:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:36,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:36,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:55:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:36,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:36,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:36,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:36,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297851670] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:36,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:36,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:36,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277233273] [2022-02-16 13:55:36,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:36,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:36,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:36,753 INFO L87 Difference]: Start difference. First operand 233 states and 603 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:37,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:37,163 INFO L93 Difference]: Finished difference Result 371 states and 880 transitions. [2022-02-16 13:55:37,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:55:37,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:37,163 INFO L225 Difference]: With dead ends: 371 [2022-02-16 13:55:37,163 INFO L226 Difference]: Without dead ends: 371 [2022-02-16 13:55:37,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:55:37,164 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 183 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:37,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 121 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-16 13:55:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 243. [2022-02-16 13:55:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.65702479338843) internal successors, (643), 242 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 643 transitions. [2022-02-16 13:55:37,167 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 643 transitions. Word has length 20 [2022-02-16 13:55:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:37,167 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 643 transitions. [2022-02-16 13:55:37,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 643 transitions. [2022-02-16 13:55:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:37,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:37,167 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:37,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:37,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2022-02-16 13:55:37,383 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:37,383 INFO L85 PathProgramCache]: Analyzing trace with hash -834375588, now seen corresponding path program 428 times [2022-02-16 13:55:37,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:37,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170280507] [2022-02-16 13:55:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:37,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:37,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:37,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170280507] [2022-02-16 13:55:37,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170280507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:37,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116634261] [2022-02-16 13:55:37,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:55:37,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:37,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:37,457 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:37,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-02-16 13:55:37,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:55:37,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:37,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:37,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:37,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:55:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:38,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:38,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:38,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:38,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116634261] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:38,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:38,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:55:38,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616778709] [2022-02-16 13:55:38,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:38,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:55:38,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:38,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:55:38,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:55:38,222 INFO L87 Difference]: Start difference. First operand 243 states and 643 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:38,567 INFO L93 Difference]: Finished difference Result 381 states and 888 transitions. [2022-02-16 13:55:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:55:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:38,567 INFO L225 Difference]: With dead ends: 381 [2022-02-16 13:55:38,567 INFO L226 Difference]: Without dead ends: 380 [2022-02-16 13:55:38,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:55:38,568 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 158 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:38,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 145 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-16 13:55:38,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 240. [2022-02-16 13:55:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6569037656903767) internal successors, (635), 239 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 635 transitions. [2022-02-16 13:55:38,571 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 635 transitions. Word has length 20 [2022-02-16 13:55:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:38,571 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 635 transitions. [2022-02-16 13:55:38,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 635 transitions. [2022-02-16 13:55:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:38,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:38,571 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:38,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:38,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:38,783 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:38,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:38,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1340615136, now seen corresponding path program 429 times [2022-02-16 13:55:38,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:38,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869138090] [2022-02-16 13:55:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:38,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:38,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:38,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869138090] [2022-02-16 13:55:38,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869138090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:38,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867637612] [2022-02-16 13:55:38,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:55:38,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:38,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:38,907 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:38,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-02-16 13:55:39,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:55:39,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:39,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:39,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:55:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:39,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:39,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:39,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:39,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867637612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:39,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:39,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:39,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216808678] [2022-02-16 13:55:39,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:39,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:39,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:39,626 INFO L87 Difference]: Start difference. First operand 240 states and 635 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:40,284 INFO L93 Difference]: Finished difference Result 398 states and 923 transitions. [2022-02-16 13:55:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:55:40,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:40,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:40,285 INFO L225 Difference]: With dead ends: 398 [2022-02-16 13:55:40,285 INFO L226 Difference]: Without dead ends: 398 [2022-02-16 13:55:40,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2022-02-16 13:55:40,285 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 235 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:40,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 158 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-16 13:55:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 242. [2022-02-16 13:55:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.672199170124481) internal successors, (644), 241 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 644 transitions. [2022-02-16 13:55:40,288 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 644 transitions. Word has length 20 [2022-02-16 13:55:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:40,288 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 644 transitions. [2022-02-16 13:55:40,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 644 transitions. [2022-02-16 13:55:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:40,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:40,289 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:40,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-02-16 13:55:40,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2022-02-16 13:55:40,506 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:40,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:40,506 INFO L85 PathProgramCache]: Analyzing trace with hash -650893212, now seen corresponding path program 430 times [2022-02-16 13:55:40,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:40,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516344808] [2022-02-16 13:55:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:40,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:40,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:40,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516344808] [2022-02-16 13:55:40,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516344808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:40,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871606370] [2022-02-16 13:55:40,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:55:40,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:40,604 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:40,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-02-16 13:55:40,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:55:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:40,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:40,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:41,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:55:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:41,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:41,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:41,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:41,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871606370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:41,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:41,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:55:41,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018899973] [2022-02-16 13:55:41,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:41,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:55:41,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:55:41,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:55:41,418 INFO L87 Difference]: Start difference. First operand 242 states and 644 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:41,958 INFO L93 Difference]: Finished difference Result 396 states and 920 transitions. [2022-02-16 13:55:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:55:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:41,959 INFO L225 Difference]: With dead ends: 396 [2022-02-16 13:55:41,959 INFO L226 Difference]: Without dead ends: 396 [2022-02-16 13:55:41,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:55:41,959 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 157 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:41,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 154 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-02-16 13:55:41,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 240. [2022-02-16 13:55:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6569037656903767) internal successors, (635), 239 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 635 transitions. [2022-02-16 13:55:41,962 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 635 transitions. Word has length 20 [2022-02-16 13:55:41,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:41,962 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 635 transitions. [2022-02-16 13:55:41,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 635 transitions. [2022-02-16 13:55:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:41,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:41,963 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:41,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:42,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-02-16 13:55:42,171 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1001898840, now seen corresponding path program 431 times [2022-02-16 13:55:42,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:42,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457056800] [2022-02-16 13:55:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:42,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:42,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:42,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457056800] [2022-02-16 13:55:42,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457056800] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:42,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333912122] [2022-02-16 13:55:42,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:55:42,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:42,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:42,295 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:42,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-02-16 13:55:42,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:55:42,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:42,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:55:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:42,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:42,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:42,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:42,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333912122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:42,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:42,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:55:42,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847739749] [2022-02-16 13:55:42,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:42,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:55:42,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:55:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:55:42,990 INFO L87 Difference]: Start difference. First operand 240 states and 635 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:43,448 INFO L93 Difference]: Finished difference Result 399 states and 922 transitions. [2022-02-16 13:55:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:55:43,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:43,448 INFO L225 Difference]: With dead ends: 399 [2022-02-16 13:55:43,448 INFO L226 Difference]: Without dead ends: 397 [2022-02-16 13:55:43,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:55:43,449 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:43,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 166 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-02-16 13:55:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 243. [2022-02-16 13:55:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.65702479338843) internal successors, (643), 242 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 643 transitions. [2022-02-16 13:55:43,452 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 643 transitions. Word has length 20 [2022-02-16 13:55:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:43,452 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 643 transitions. [2022-02-16 13:55:43,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 643 transitions. [2022-02-16 13:55:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:43,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:43,452 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:43,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:43,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-02-16 13:55:43,667 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:43,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:43,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2116996636, now seen corresponding path program 432 times [2022-02-16 13:55:43,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:43,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038501295] [2022-02-16 13:55:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:43,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:43,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:43,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038501295] [2022-02-16 13:55:43,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038501295] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:43,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464774239] [2022-02-16 13:55:43,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:55:43,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:43,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:43,746 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:43,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-02-16 13:55:44,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:55:44,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:44,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:44,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:55:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:44,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:44,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:44,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:44,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464774239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:44,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:44,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:55:44,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965466942] [2022-02-16 13:55:44,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:44,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:55:44,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:55:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:55:44,467 INFO L87 Difference]: Start difference. First operand 243 states and 643 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:44,814 INFO L93 Difference]: Finished difference Result 401 states and 928 transitions. [2022-02-16 13:55:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:55:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:44,815 INFO L225 Difference]: With dead ends: 401 [2022-02-16 13:55:44,815 INFO L226 Difference]: Without dead ends: 401 [2022-02-16 13:55:44,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:55:44,815 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 156 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:44,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 132 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-16 13:55:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 241. [2022-02-16 13:55:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6416666666666666) internal successors, (634), 240 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 634 transitions. [2022-02-16 13:55:44,818 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 634 transitions. Word has length 20 [2022-02-16 13:55:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:44,818 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 634 transitions. [2022-02-16 13:55:44,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 634 transitions. [2022-02-16 13:55:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:44,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:44,819 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:44,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:45,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-02-16 13:55:45,035 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:45,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1686894982, now seen corresponding path program 433 times [2022-02-16 13:55:45,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:45,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267033780] [2022-02-16 13:55:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:45,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:45,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:45,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267033780] [2022-02-16 13:55:45,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267033780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:45,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175937637] [2022-02-16 13:55:45,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:55:45,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:45,156 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:45,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-02-16 13:55:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:45,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:45,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:45,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:55:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:45,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:45,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:45,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:45,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175937637] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:45,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:45,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:45,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69264487] [2022-02-16 13:55:45,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:45,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:45,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:45,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:45,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:45,864 INFO L87 Difference]: Start difference. First operand 241 states and 634 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:46,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:46,262 INFO L93 Difference]: Finished difference Result 378 states and 915 transitions. [2022-02-16 13:55:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:55:46,262 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:46,263 INFO L225 Difference]: With dead ends: 378 [2022-02-16 13:55:46,263 INFO L226 Difference]: Without dead ends: 378 [2022-02-16 13:55:46,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:55:46,263 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:46,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 119 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-02-16 13:55:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 245. [2022-02-16 13:55:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.6639344262295084) internal successors, (650), 244 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:46,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 650 transitions. [2022-02-16 13:55:46,266 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 650 transitions. Word has length 20 [2022-02-16 13:55:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:46,266 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 650 transitions. [2022-02-16 13:55:46,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 650 transitions. [2022-02-16 13:55:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:46,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:46,267 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:46,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Ended with exit code 0 [2022-02-16 13:55:46,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:46,467 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1918350390, now seen corresponding path program 434 times [2022-02-16 13:55:46,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:46,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99520754] [2022-02-16 13:55:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:46,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:46,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:46,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99520754] [2022-02-16 13:55:46,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99520754] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:46,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666905756] [2022-02-16 13:55:46,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:55:46,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:46,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:46,576 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:46,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-02-16 13:55:46,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:55:46,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:46,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:47,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:55:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:47,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:47,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:47,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:47,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666905756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:47,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:47,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:55:47,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045025110] [2022-02-16 13:55:47,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:47,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:55:47,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:55:47,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:55:47,410 INFO L87 Difference]: Start difference. First operand 245 states and 650 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:47,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:47,954 INFO L93 Difference]: Finished difference Result 385 states and 921 transitions. [2022-02-16 13:55:47,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:55:47,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:47,956 INFO L225 Difference]: With dead ends: 385 [2022-02-16 13:55:47,956 INFO L226 Difference]: Without dead ends: 385 [2022-02-16 13:55:47,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:55:47,956 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 129 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:47,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 163 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:47,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-02-16 13:55:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 243. [2022-02-16 13:55:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6487603305785123) internal successors, (641), 242 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 641 transitions. [2022-02-16 13:55:47,960 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 641 transitions. Word has length 20 [2022-02-16 13:55:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:47,961 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 641 transitions. [2022-02-16 13:55:47,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 641 transitions. [2022-02-16 13:55:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:47,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:47,961 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:47,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Ended with exit code 0 [2022-02-16 13:55:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2022-02-16 13:55:48,175 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2081189724, now seen corresponding path program 435 times [2022-02-16 13:55:48,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:48,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500990637] [2022-02-16 13:55:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:48,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:48,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:48,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500990637] [2022-02-16 13:55:48,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500990637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:48,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841340387] [2022-02-16 13:55:48,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:55:48,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:48,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:48,364 INFO L229 MonitoredProcess]: Starting monitored process 436 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:48,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-02-16 13:55:48,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:55:48,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:48,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:48,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:48,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:49,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:49,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:49,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841340387] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:49,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:49,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:55:49,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878589735] [2022-02-16 13:55:49,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:49,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:55:49,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:49,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:55:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:55:49,203 INFO L87 Difference]: Start difference. First operand 243 states and 641 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:49,406 INFO L93 Difference]: Finished difference Result 346 states and 857 transitions. [2022-02-16 13:55:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:49,407 INFO L225 Difference]: With dead ends: 346 [2022-02-16 13:55:49,407 INFO L226 Difference]: Without dead ends: 346 [2022-02-16 13:55:49,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:55:49,407 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:49,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 88 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-16 13:55:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 241. [2022-02-16 13:55:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6416666666666666) internal successors, (634), 240 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 634 transitions. [2022-02-16 13:55:49,410 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 634 transitions. Word has length 20 [2022-02-16 13:55:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:49,410 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 634 transitions. [2022-02-16 13:55:49,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 634 transitions. [2022-02-16 13:55:49,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:49,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:49,411 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:49,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:49,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-02-16 13:55:49,616 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1916980328, now seen corresponding path program 436 times [2022-02-16 13:55:49,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:49,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008361369] [2022-02-16 13:55:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:49,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:49,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:49,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008361369] [2022-02-16 13:55:49,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008361369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:49,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88133791] [2022-02-16 13:55:49,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:55:49,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:49,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:49,727 INFO L229 MonitoredProcess]: Starting monitored process 437 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:49,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-02-16 13:55:49,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:55:49,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:49,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:49,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:50,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:55:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:50,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:50,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:50,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:50,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88133791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:50,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:50,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:55:50,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405242894] [2022-02-16 13:55:50,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:50,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:55:50,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:55:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:55:50,422 INFO L87 Difference]: Start difference. First operand 241 states and 634 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:50,692 INFO L93 Difference]: Finished difference Result 370 states and 889 transitions. [2022-02-16 13:55:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:50,692 INFO L225 Difference]: With dead ends: 370 [2022-02-16 13:55:50,692 INFO L226 Difference]: Without dead ends: 368 [2022-02-16 13:55:50,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:55:50,693 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:50,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 120 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-16 13:55:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 245. [2022-02-16 13:55:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.651639344262295) internal successors, (647), 244 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 647 transitions. [2022-02-16 13:55:50,696 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 647 transitions. Word has length 20 [2022-02-16 13:55:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:50,696 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 647 transitions. [2022-02-16 13:55:50,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 647 transitions. [2022-02-16 13:55:50,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:50,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:50,696 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:50,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:50,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2022-02-16 13:55:50,907 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1262889172, now seen corresponding path program 437 times [2022-02-16 13:55:50,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:50,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396538904] [2022-02-16 13:55:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:50,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:50,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:50,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396538904] [2022-02-16 13:55:50,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396538904] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:50,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88642651] [2022-02-16 13:55:50,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:55:50,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:50,992 INFO L229 MonitoredProcess]: Starting monitored process 438 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:50,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-02-16 13:55:51,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:55:51,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:51,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:51,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:51,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:55:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:51,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:51,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:51,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:51,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88642651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:51,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:51,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:51,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987123709] [2022-02-16 13:55:51,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:51,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:51,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:51,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:51,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:51,702 INFO L87 Difference]: Start difference. First operand 245 states and 647 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:52,153 INFO L93 Difference]: Finished difference Result 372 states and 895 transitions. [2022-02-16 13:55:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:55:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:52,153 INFO L225 Difference]: With dead ends: 372 [2022-02-16 13:55:52,153 INFO L226 Difference]: Without dead ends: 372 [2022-02-16 13:55:52,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:55:52,154 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:52,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 158 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-16 13:55:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 243. [2022-02-16 13:55:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.644628099173554) internal successors, (640), 242 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 640 transitions. [2022-02-16 13:55:52,157 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 640 transitions. Word has length 20 [2022-02-16 13:55:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:52,157 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 640 transitions. [2022-02-16 13:55:52,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 640 transitions. [2022-02-16 13:55:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:52,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:52,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:52,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Ended with exit code 0 [2022-02-16 13:55:52,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:52,365 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash 220245766, now seen corresponding path program 438 times [2022-02-16 13:55:52,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:52,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933685401] [2022-02-16 13:55:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:52,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:52,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:52,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933685401] [2022-02-16 13:55:52,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933685401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:52,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697093355] [2022-02-16 13:55:52,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:55:52,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:52,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:52,469 INFO L229 MonitoredProcess]: Starting monitored process 439 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:52,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-02-16 13:55:52,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:55:52,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:52,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:52,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:52,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:53,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:53,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:53,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697093355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:53,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:53,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:53,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380515457] [2022-02-16 13:55:53,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:53,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:53,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:53,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:53,083 INFO L87 Difference]: Start difference. First operand 243 states and 640 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:53,324 INFO L93 Difference]: Finished difference Result 354 states and 873 transitions. [2022-02-16 13:55:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:53,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:53,324 INFO L225 Difference]: With dead ends: 354 [2022-02-16 13:55:53,324 INFO L226 Difference]: Without dead ends: 354 [2022-02-16 13:55:53,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:55:53,325 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:53,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 109 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-02-16 13:55:53,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 241. [2022-02-16 13:55:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6333333333333333) internal successors, (632), 240 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 632 transitions. [2022-02-16 13:55:53,328 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 632 transitions. Word has length 20 [2022-02-16 13:55:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:53,328 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 632 transitions. [2022-02-16 13:55:53,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 632 transitions. [2022-02-16 13:55:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:53,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:53,328 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:53,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Ended with exit code 0 [2022-02-16 13:55:53,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:53,545 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 626116892, now seen corresponding path program 439 times [2022-02-16 13:55:53,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:53,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318941611] [2022-02-16 13:55:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:53,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:53,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:53,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318941611] [2022-02-16 13:55:53,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318941611] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:53,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111384063] [2022-02-16 13:55:53,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:55:53,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:53,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:53,604 INFO L229 MonitoredProcess]: Starting monitored process 440 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:53,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-02-16 13:55:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:53,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:53,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:55:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:53,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:54,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:54,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:54,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111384063] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:54,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:54,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:55:54,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974506582] [2022-02-16 13:55:54,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:54,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:55:54,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:54,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:55:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:55:54,086 INFO L87 Difference]: Start difference. First operand 241 states and 632 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:54,242 INFO L93 Difference]: Finished difference Result 395 states and 930 transitions. [2022-02-16 13:55:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:54,243 INFO L225 Difference]: With dead ends: 395 [2022-02-16 13:55:54,243 INFO L226 Difference]: Without dead ends: 395 [2022-02-16 13:55:54,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:55:54,243 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:54,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 139 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-16 13:55:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 243. [2022-02-16 13:55:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6363636363636362) internal successors, (638), 242 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 638 transitions. [2022-02-16 13:55:54,246 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 638 transitions. Word has length 20 [2022-02-16 13:55:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:54,246 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 638 transitions. [2022-02-16 13:55:54,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 638 transitions. [2022-02-16 13:55:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:54,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:54,247 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:54,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Ended with exit code 0 [2022-02-16 13:55:54,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:54,459 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1315838816, now seen corresponding path program 440 times [2022-02-16 13:55:54,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:54,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625720058] [2022-02-16 13:55:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:54,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:54,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:54,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625720058] [2022-02-16 13:55:54,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625720058] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:54,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761423704] [2022-02-16 13:55:54,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:55:54,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:54,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:54,549 INFO L229 MonitoredProcess]: Starting monitored process 441 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:54,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-02-16 13:55:54,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:55:54,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:54,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:54,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:55,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-02-16 13:55:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:55,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:55,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:55,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:55,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761423704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:55,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:55,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:55,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180920833] [2022-02-16 13:55:55,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:55,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:55,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:55,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:55,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:55,367 INFO L87 Difference]: Start difference. First operand 243 states and 638 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:55,733 INFO L93 Difference]: Finished difference Result 408 states and 947 transitions. [2022-02-16 13:55:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:55:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:55,733 INFO L225 Difference]: With dead ends: 408 [2022-02-16 13:55:55,734 INFO L226 Difference]: Without dead ends: 408 [2022-02-16 13:55:55,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:55:55,734 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 178 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:55,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 195 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-02-16 13:55:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 241. [2022-02-16 13:55:55,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.620833333333333) internal successors, (629), 240 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 629 transitions. [2022-02-16 13:55:55,737 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 629 transitions. Word has length 20 [2022-02-16 13:55:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:55,737 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 629 transitions. [2022-02-16 13:55:55,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 629 transitions. [2022-02-16 13:55:55,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:55,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:55,738 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:55,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:55,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-02-16 13:55:55,952 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:55,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:55,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1020411634, now seen corresponding path program 441 times [2022-02-16 13:55:55,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:55,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695081417] [2022-02-16 13:55:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:55,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:56,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:56,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695081417] [2022-02-16 13:55:56,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695081417] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:56,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327983410] [2022-02-16 13:55:56,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:55:56,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:56,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:56,037 INFO L229 MonitoredProcess]: Starting monitored process 442 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:56,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-02-16 13:55:56,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:55:56,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:56,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:56,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:56,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:56,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:56,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:56,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327983410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:56,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:56,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-02-16 13:55:56,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747744079] [2022-02-16 13:55:56,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:56,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:55:56,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:55:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:56,625 INFO L87 Difference]: Start difference. First operand 241 states and 629 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:56,919 INFO L93 Difference]: Finished difference Result 366 states and 875 transitions. [2022-02-16 13:55:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:56,920 INFO L225 Difference]: With dead ends: 366 [2022-02-16 13:55:56,920 INFO L226 Difference]: Without dead ends: 366 [2022-02-16 13:55:56,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:55:56,920 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:56,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 173 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-02-16 13:55:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 236. [2022-02-16 13:55:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6127659574468085) internal successors, (614), 235 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 614 transitions. [2022-02-16 13:55:56,923 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 614 transitions. Word has length 20 [2022-02-16 13:55:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:56,923 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 614 transitions. [2022-02-16 13:55:56,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 614 transitions. [2022-02-16 13:55:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:56,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:56,924 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:56,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Ended with exit code 0 [2022-02-16 13:55:57,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 442 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2022-02-16 13:55:57,142 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash 258324580, now seen corresponding path program 442 times [2022-02-16 13:55:57,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:57,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782695241] [2022-02-16 13:55:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:57,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:57,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:57,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782695241] [2022-02-16 13:55:57,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782695241] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:57,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058740057] [2022-02-16 13:55:57,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:55:57,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:57,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:57,222 INFO L229 MonitoredProcess]: Starting monitored process 443 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:57,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-02-16 13:55:57,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:55:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:57,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:57,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:57,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:57,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:57,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058740057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:57,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:57,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:55:57,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567536898] [2022-02-16 13:55:57,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:57,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:55:57,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:55:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:55:57,996 INFO L87 Difference]: Start difference. First operand 236 states and 614 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:58,234 INFO L93 Difference]: Finished difference Result 370 states and 871 transitions. [2022-02-16 13:55:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:58,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:58,235 INFO L225 Difference]: With dead ends: 370 [2022-02-16 13:55:58,235 INFO L226 Difference]: Without dead ends: 370 [2022-02-16 13:55:58,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:55:58,235 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:58,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 111 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:55:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-16 13:55:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 234. [2022-02-16 13:55:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6051502145922747) internal successors, (607), 233 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 607 transitions. [2022-02-16 13:55:58,239 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 607 transitions. Word has length 20 [2022-02-16 13:55:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:58,239 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 607 transitions. [2022-02-16 13:55:58,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 607 transitions. [2022-02-16 13:55:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:58,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:58,240 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:58,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Ended with exit code 0 [2022-02-16 13:55:58,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:58,447 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash -204575852, now seen corresponding path program 443 times [2022-02-16 13:55:58,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:58,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775249431] [2022-02-16 13:55:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:58,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:58,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:58,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775249431] [2022-02-16 13:55:58,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775249431] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:58,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315277555] [2022-02-16 13:55:58,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:55:58,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:58,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:58,543 INFO L229 MonitoredProcess]: Starting monitored process 444 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:58,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-02-16 13:55:58,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:55:58,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:55:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:55:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:55:59,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:55:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:59,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:55:59,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:55:59,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:55:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:59,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315277555] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:55:59,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:55:59,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-02-16 13:55:59,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884880764] [2022-02-16 13:55:59,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:55:59,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:55:59,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:55:59,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:55:59,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:55:59,205 INFO L87 Difference]: Start difference. First operand 234 states and 607 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:59,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:55:59,470 INFO L93 Difference]: Finished difference Result 381 states and 893 transitions. [2022-02-16 13:55:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:55:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:55:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:55:59,470 INFO L225 Difference]: With dead ends: 381 [2022-02-16 13:55:59,470 INFO L226 Difference]: Without dead ends: 379 [2022-02-16 13:55:59,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:55:59,471 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 122 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:55:59,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 150 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:55:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-02-16 13:55:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 241. [2022-02-16 13:55:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6083333333333334) internal successors, (626), 240 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 626 transitions. [2022-02-16 13:55:59,474 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 626 transitions. Word has length 20 [2022-02-16 13:55:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:55:59,474 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 626 transitions. [2022-02-16 13:55:59,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:55:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 626 transitions. [2022-02-16 13:55:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:55:59,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:55:59,474 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:55:59,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Forceful destruction successful, exit code 0 [2022-02-16 13:55:59,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2022-02-16 13:55:59,692 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:55:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:55:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash 910521944, now seen corresponding path program 444 times [2022-02-16 13:55:59,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:55:59,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246653106] [2022-02-16 13:55:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:55:59,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:55:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:55:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:55:59,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:55:59,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246653106] [2022-02-16 13:55:59,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246653106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:55:59,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693546150] [2022-02-16 13:55:59,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:55:59,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:55:59,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:55:59,768 INFO L229 MonitoredProcess]: Starting monitored process 445 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:55:59,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-02-16 13:56:00,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:56:00,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:00,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:00,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:00,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:00,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:56:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:00,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693546150] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:00,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:00,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:56:00,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273273537] [2022-02-16 13:56:00,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:00,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:00,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:00,594 INFO L87 Difference]: Start difference. First operand 241 states and 626 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:01,029 INFO L93 Difference]: Finished difference Result 383 states and 899 transitions. [2022-02-16 13:56:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:56:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:01,030 INFO L225 Difference]: With dead ends: 383 [2022-02-16 13:56:01,030 INFO L226 Difference]: Without dead ends: 383 [2022-02-16 13:56:01,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:56:01,031 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:01,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 166 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-16 13:56:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 240. [2022-02-16 13:56:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6066945606694563) internal successors, (623), 239 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 623 transitions. [2022-02-16 13:56:01,035 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 623 transitions. Word has length 20 [2022-02-16 13:56:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:01,035 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 623 transitions. [2022-02-16 13:56:01,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 623 transitions. [2022-02-16 13:56:01,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:01,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:01,036 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:01,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Ended with exit code 0 [2022-02-16 13:56:01,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2022-02-16 13:56:01,259 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:01,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1901310414, now seen corresponding path program 445 times [2022-02-16 13:56:01,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:01,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060822340] [2022-02-16 13:56:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:01,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:01,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:01,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060822340] [2022-02-16 13:56:01,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060822340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:01,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429886991] [2022-02-16 13:56:01,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:56:01,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:01,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:01,350 INFO L229 MonitoredProcess]: Starting monitored process 446 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:01,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-02-16 13:56:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:01,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:01,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:02,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:02,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:02,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:56:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:02,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429886991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:02,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:02,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-02-16 13:56:02,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175741584] [2022-02-16 13:56:02,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:02,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:02,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:02,234 INFO L87 Difference]: Start difference. First operand 240 states and 623 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:02,584 INFO L93 Difference]: Finished difference Result 371 states and 887 transitions. [2022-02-16 13:56:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:02,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:02,585 INFO L225 Difference]: With dead ends: 371 [2022-02-16 13:56:02,585 INFO L226 Difference]: Without dead ends: 371 [2022-02-16 13:56:02,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:56:02,586 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:02,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 132 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-16 13:56:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 239. [2022-02-16 13:56:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6050420168067228) internal successors, (620), 238 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 620 transitions. [2022-02-16 13:56:02,588 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 620 transitions. Word has length 20 [2022-02-16 13:56:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:02,588 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 620 transitions. [2022-02-16 13:56:02,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 620 transitions. [2022-02-16 13:56:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:02,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:02,589 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:02,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Ended with exit code 0 [2022-02-16 13:56:02,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2022-02-16 13:56:02,799 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash 281228252, now seen corresponding path program 446 times [2022-02-16 13:56:02,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:02,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191330393] [2022-02-16 13:56:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:02,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:02,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:02,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191330393] [2022-02-16 13:56:02,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191330393] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:02,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575552193] [2022-02-16 13:56:02,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:56:02,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:02,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:02,880 INFO L229 MonitoredProcess]: Starting monitored process 447 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:02,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-02-16 13:56:03,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:03,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:03,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:03,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:03,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:56:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:03,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575552193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:03,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:03,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:56:03,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124921036] [2022-02-16 13:56:03,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:03,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:56:03,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:56:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:56:03,504 INFO L87 Difference]: Start difference. First operand 239 states and 620 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:03,731 INFO L93 Difference]: Finished difference Result 380 states and 897 transitions. [2022-02-16 13:56:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:03,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:03,732 INFO L225 Difference]: With dead ends: 380 [2022-02-16 13:56:03,732 INFO L226 Difference]: Without dead ends: 380 [2022-02-16 13:56:03,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:03,732 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:03,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 155 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-16 13:56:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 234. [2022-02-16 13:56:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6051502145922747) internal successors, (607), 233 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 607 transitions. [2022-02-16 13:56:03,747 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 607 transitions. Word has length 20 [2022-02-16 13:56:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:03,747 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 607 transitions. [2022-02-16 13:56:03,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 607 transitions. [2022-02-16 13:56:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:03,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:03,748 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:03,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Ended with exit code 0 [2022-02-16 13:56:03,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2022-02-16 13:56:03,963 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:03,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:03,964 INFO L85 PathProgramCache]: Analyzing trace with hash -903983610, now seen corresponding path program 447 times [2022-02-16 13:56:03,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:03,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248379547] [2022-02-16 13:56:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:03,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:04,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:04,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248379547] [2022-02-16 13:56:04,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248379547] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:04,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180808055] [2022-02-16 13:56:04,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:56:04,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:04,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:04,042 INFO L229 MonitoredProcess]: Starting monitored process 448 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:04,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-02-16 13:56:04,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:56:04,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:04,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:04,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:04,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:04,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:04,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:04,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180808055] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:04,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:04,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:56:04,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862563888] [2022-02-16 13:56:04,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:04,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:56:04,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:04,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:56:04,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:56:04,590 INFO L87 Difference]: Start difference. First operand 234 states and 607 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:04,776 INFO L93 Difference]: Finished difference Result 252 states and 646 transitions. [2022-02-16 13:56:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:04,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:04,777 INFO L225 Difference]: With dead ends: 252 [2022-02-16 13:56:04,777 INFO L226 Difference]: Without dead ends: 249 [2022-02-16 13:56:04,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:56:04,777 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:04,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-16 13:56:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 237. [2022-02-16 13:56:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.597457627118644) internal successors, (613), 236 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 613 transitions. [2022-02-16 13:56:04,780 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 613 transitions. Word has length 20 [2022-02-16 13:56:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:04,780 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 613 transitions. [2022-02-16 13:56:04,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 613 transitions. [2022-02-16 13:56:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:04,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:04,780 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:04,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:04,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2022-02-16 13:56:04,981 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash -695690302, now seen corresponding path program 448 times [2022-02-16 13:56:04,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:04,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507474776] [2022-02-16 13:56:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:04,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:05,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:05,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507474776] [2022-02-16 13:56:05,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507474776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:05,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840758922] [2022-02-16 13:56:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:56:05,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:05,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:05,082 INFO L229 MonitoredProcess]: Starting monitored process 449 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:05,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-02-16 13:56:05,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:56:05,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:05,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:05,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:56:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:05,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:05,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:05,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:05,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840758922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:05,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:05,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-16 13:56:05,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572044428] [2022-02-16 13:56:05,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:05,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:56:05,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:05,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:56:05,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:56:05,706 INFO L87 Difference]: Start difference. First operand 237 states and 613 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:06,023 INFO L93 Difference]: Finished difference Result 265 states and 663 transitions. [2022-02-16 13:56:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:56:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:06,023 INFO L225 Difference]: With dead ends: 265 [2022-02-16 13:56:06,024 INFO L226 Difference]: Without dead ends: 263 [2022-02-16 13:56:06,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:56:06,024 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:06,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 106 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-16 13:56:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 240. [2022-02-16 13:56:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.594142259414226) internal successors, (620), 239 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 620 transitions. [2022-02-16 13:56:06,026 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 620 transitions. Word has length 20 [2022-02-16 13:56:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:06,026 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 620 transitions. [2022-02-16 13:56:06,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 620 transitions. [2022-02-16 13:56:06,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:06,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:06,027 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:06,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:06,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:06,235 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash 419407494, now seen corresponding path program 449 times [2022-02-16 13:56:06,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:06,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6445229] [2022-02-16 13:56:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:06,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:06,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:06,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6445229] [2022-02-16 13:56:06,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6445229] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:06,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329714409] [2022-02-16 13:56:06,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:56:06,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:06,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:06,372 INFO L229 MonitoredProcess]: Starting monitored process 450 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:06,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-02-16 13:56:06,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:56:06,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:06,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:56:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:06,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:07,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:07,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:07,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329714409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:07,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:07,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-02-16 13:56:07,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678706893] [2022-02-16 13:56:07,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:07,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:56:07,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:07,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:56:07,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:56:07,162 INFO L87 Difference]: Start difference. First operand 240 states and 620 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:07,402 INFO L93 Difference]: Finished difference Result 252 states and 649 transitions. [2022-02-16 13:56:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:07,403 INFO L225 Difference]: With dead ends: 252 [2022-02-16 13:56:07,403 INFO L226 Difference]: Without dead ends: 252 [2022-02-16 13:56:07,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:56:07,403 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:07,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 89 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-16 13:56:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 236. [2022-02-16 13:56:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6) internal successors, (611), 235 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 611 transitions. [2022-02-16 13:56:07,405 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 611 transitions. Word has length 20 [2022-02-16 13:56:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:07,405 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 611 transitions. [2022-02-16 13:56:07,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 611 transitions. [2022-02-16 13:56:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:07,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:07,406 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:07,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:07,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:07,623 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1963147480, now seen corresponding path program 450 times [2022-02-16 13:56:07,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:07,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031332802] [2022-02-16 13:56:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:07,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:07,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:07,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031332802] [2022-02-16 13:56:07,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031332802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:07,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866341997] [2022-02-16 13:56:07,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:56:07,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:07,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:07,712 INFO L229 MonitoredProcess]: Starting monitored process 451 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:07,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-02-16 13:56:08,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:56:08,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:08,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:08,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:08,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:08,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:08,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:08,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:56:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:08,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866341997] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:08,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:08,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:56:08,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068179850] [2022-02-16 13:56:08,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:08,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:56:08,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:56:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:56:08,287 INFO L87 Difference]: Start difference. First operand 236 states and 611 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:08,435 INFO L93 Difference]: Finished difference Result 267 states and 667 transitions. [2022-02-16 13:56:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:08,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:08,436 INFO L225 Difference]: With dead ends: 267 [2022-02-16 13:56:08,436 INFO L226 Difference]: Without dead ends: 265 [2022-02-16 13:56:08,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:56:08,436 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:08,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 81 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-16 13:56:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 241. [2022-02-16 13:56:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.595833333333333) internal successors, (623), 240 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 623 transitions. [2022-02-16 13:56:08,439 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 623 transitions. Word has length 20 [2022-02-16 13:56:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:08,439 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 623 transitions. [2022-02-16 13:56:08,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 623 transitions. [2022-02-16 13:56:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:08,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:08,439 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:08,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-02-16 13:56:08,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:08,656 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -848049684, now seen corresponding path program 451 times [2022-02-16 13:56:08,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:08,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502163796] [2022-02-16 13:56:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:08,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:08,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:08,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502163796] [2022-02-16 13:56:08,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502163796] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:08,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252715903] [2022-02-16 13:56:08,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:56:08,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:08,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:08,723 INFO L229 MonitoredProcess]: Starting monitored process 452 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:08,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-02-16 13:56:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:09,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:09,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:09,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:09,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:09,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:09,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:56:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:09,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252715903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:09,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:09,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:56:09,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793148492] [2022-02-16 13:56:09,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:09,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:56:09,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:09,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:56:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:56:09,352 INFO L87 Difference]: Start difference. First operand 241 states and 623 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:09,515 INFO L93 Difference]: Finished difference Result 267 states and 669 transitions. [2022-02-16 13:56:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:56:09,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:09,515 INFO L225 Difference]: With dead ends: 267 [2022-02-16 13:56:09,516 INFO L226 Difference]: Without dead ends: 267 [2022-02-16 13:56:09,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:09,516 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:09,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 80 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:09,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-02-16 13:56:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 240. [2022-02-16 13:56:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.598326359832636) internal successors, (621), 239 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 621 transitions. [2022-02-16 13:56:09,518 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 621 transitions. Word has length 20 [2022-02-16 13:56:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:09,518 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 621 transitions. [2022-02-16 13:56:09,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 621 transitions. [2022-02-16 13:56:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:09,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:09,519 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:09,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:09,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:09,723 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash 635085254, now seen corresponding path program 452 times [2022-02-16 13:56:09,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:09,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265967646] [2022-02-16 13:56:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:09,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:09,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:09,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265967646] [2022-02-16 13:56:09,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265967646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:09,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968579759] [2022-02-16 13:56:09,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:56:09,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:09,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:09,797 INFO L229 MonitoredProcess]: Starting monitored process 453 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:09,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-02-16 13:56:10,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:10,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:10,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:10,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:10,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:10,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:10,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:56:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:10,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968579759] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:10,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:10,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:56:10,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990666940] [2022-02-16 13:56:10,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:10,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:56:10,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:10,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:56:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:56:10,359 INFO L87 Difference]: Start difference. First operand 240 states and 621 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:10,551 INFO L93 Difference]: Finished difference Result 255 states and 655 transitions. [2022-02-16 13:56:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:10,551 INFO L225 Difference]: With dead ends: 255 [2022-02-16 13:56:10,551 INFO L226 Difference]: Without dead ends: 255 [2022-02-16 13:56:10,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:56:10,552 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:10,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 80 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-16 13:56:10,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 235. [2022-02-16 13:56:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6025641025641026) internal successors, (609), 234 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 609 transitions. [2022-02-16 13:56:10,554 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 609 transitions. Word has length 20 [2022-02-16 13:56:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:10,554 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 609 transitions. [2022-02-16 13:56:10,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:10,554 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 609 transitions. [2022-02-16 13:56:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:10,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:10,555 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:10,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:10,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:10,755 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:10,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1271041726, now seen corresponding path program 453 times [2022-02-16 13:56:10,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:10,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013346587] [2022-02-16 13:56:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:10,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:10,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:10,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013346587] [2022-02-16 13:56:10,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013346587] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:10,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752586732] [2022-02-16 13:56:10,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:56:10,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:10,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:10,827 INFO L229 MonitoredProcess]: Starting monitored process 454 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:10,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-02-16 13:56:11,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:56:11,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:11,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:11,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:11,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:11,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:11,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:11,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:56:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:11,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752586732] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:11,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:11,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:56:11,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656237956] [2022-02-16 13:56:11,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:11,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:56:11,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:11,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:56:11,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:56:11,384 INFO L87 Difference]: Start difference. First operand 235 states and 609 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:11,517 INFO L93 Difference]: Finished difference Result 294 states and 710 transitions. [2022-02-16 13:56:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:11,518 INFO L225 Difference]: With dead ends: 294 [2022-02-16 13:56:11,518 INFO L226 Difference]: Without dead ends: 292 [2022-02-16 13:56:11,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:56:11,518 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:11,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 74 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-16 13:56:11,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 242. [2022-02-16 13:56:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6058091286307055) internal successors, (628), 241 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 628 transitions. [2022-02-16 13:56:11,521 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 628 transitions. Word has length 20 [2022-02-16 13:56:11,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:11,521 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 628 transitions. [2022-02-16 13:56:11,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 628 transitions. [2022-02-16 13:56:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:11,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:11,521 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:11,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:11,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2022-02-16 13:56:11,738 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1908827774, now seen corresponding path program 454 times [2022-02-16 13:56:11,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:11,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842095590] [2022-02-16 13:56:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:11,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:11,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:11,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842095590] [2022-02-16 13:56:11,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842095590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:11,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701620983] [2022-02-16 13:56:11,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:56:11,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:11,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:11,809 INFO L229 MonitoredProcess]: Starting monitored process 455 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:11,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-02-16 13:56:12,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:56:12,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:12,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:12,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:12,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:12,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:12,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:56:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:12,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701620983] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:12,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:12,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:56:12,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797062106] [2022-02-16 13:56:12,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:12,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:56:12,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:12,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:56:12,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:56:12,397 INFO L87 Difference]: Start difference. First operand 242 states and 628 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:12,643 INFO L93 Difference]: Finished difference Result 294 states and 712 transitions. [2022-02-16 13:56:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:56:12,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:12,644 INFO L225 Difference]: With dead ends: 294 [2022-02-16 13:56:12,644 INFO L226 Difference]: Without dead ends: 294 [2022-02-16 13:56:12,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:12,644 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:12,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 138 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-16 13:56:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 241. [2022-02-16 13:56:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6041666666666665) internal successors, (625), 240 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 625 transitions. [2022-02-16 13:56:12,647 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 625 transitions. Word has length 20 [2022-02-16 13:56:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:12,647 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 625 transitions. [2022-02-16 13:56:12,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 625 transitions. [2022-02-16 13:56:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:12,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:12,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:12,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:12,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2022-02-16 13:56:12,852 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash -425692836, now seen corresponding path program 455 times [2022-02-16 13:56:12,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:12,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154294115] [2022-02-16 13:56:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:12,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:12,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:12,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154294115] [2022-02-16 13:56:12,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154294115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:12,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740306887] [2022-02-16 13:56:12,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:56:12,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:12,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:12,916 INFO L229 MonitoredProcess]: Starting monitored process 456 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:12,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-02-16 13:56:13,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:56:13,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:13,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:13,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:13,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:13,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:13,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:56:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:13,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740306887] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:13,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:13,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:56:13,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24855157] [2022-02-16 13:56:13,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:13,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:56:13,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:56:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:56:13,501 INFO L87 Difference]: Start difference. First operand 241 states and 625 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:13,672 INFO L93 Difference]: Finished difference Result 287 states and 709 transitions. [2022-02-16 13:56:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:13,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:13,672 INFO L225 Difference]: With dead ends: 287 [2022-02-16 13:56:13,672 INFO L226 Difference]: Without dead ends: 287 [2022-02-16 13:56:13,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:56:13,673 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:13,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 74 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-16 13:56:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 240. [2022-02-16 13:56:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.602510460251046) internal successors, (622), 239 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 622 transitions. [2022-02-16 13:56:13,675 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 622 transitions. Word has length 20 [2022-02-16 13:56:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:13,675 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 622 transitions. [2022-02-16 13:56:13,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 622 transitions. [2022-02-16 13:56:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:13,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:13,676 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:13,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:13,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:13,876 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1756845830, now seen corresponding path program 456 times [2022-02-16 13:56:13,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:13,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206418812] [2022-02-16 13:56:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:13,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:13,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:13,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206418812] [2022-02-16 13:56:13,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206418812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:13,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965339237] [2022-02-16 13:56:13,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:56:13,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:13,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:13,959 INFO L229 MonitoredProcess]: Starting monitored process 457 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:13,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-02-16 13:56:14,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:56:14,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:14,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:14,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:14,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:14,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:56:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:14,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965339237] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:14,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:14,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 13:56:14,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879867505] [2022-02-16 13:56:14,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:14,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:56:14,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:14,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:56:14,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:56:14,498 INFO L87 Difference]: Start difference. First operand 240 states and 622 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:14,645 INFO L93 Difference]: Finished difference Result 296 states and 715 transitions. [2022-02-16 13:56:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:14,646 INFO L225 Difference]: With dead ends: 296 [2022-02-16 13:56:14,646 INFO L226 Difference]: Without dead ends: 296 [2022-02-16 13:56:14,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:56:14,646 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:14,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 101 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-16 13:56:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 235. [2022-02-16 13:56:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6025641025641026) internal successors, (609), 234 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 609 transitions. [2022-02-16 13:56:14,650 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 609 transitions. Word has length 20 [2022-02-16 13:56:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:14,650 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 609 transitions. [2022-02-16 13:56:14,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 609 transitions. [2022-02-16 13:56:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:14,651 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:14,651 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:14,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:14,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:14,861 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash -579667860, now seen corresponding path program 457 times [2022-02-16 13:56:14,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:14,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299668308] [2022-02-16 13:56:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:14,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:14,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:14,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299668308] [2022-02-16 13:56:14,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299668308] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:14,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558571950] [2022-02-16 13:56:14,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:56:14,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:14,961 INFO L229 MonitoredProcess]: Starting monitored process 458 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:14,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-02-16 13:56:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:15,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:56:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:15,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:15,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:15,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:15,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558571950] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:15,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:15,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:15,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903301734] [2022-02-16 13:56:15,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:15,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:15,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:15,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:15,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:15,959 INFO L87 Difference]: Start difference. First operand 235 states and 609 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:16,468 INFO L93 Difference]: Finished difference Result 415 states and 960 transitions. [2022-02-16 13:56:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:16,468 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:16,469 INFO L225 Difference]: With dead ends: 415 [2022-02-16 13:56:16,469 INFO L226 Difference]: Without dead ends: 415 [2022-02-16 13:56:16,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:56:16,469 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 178 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:16,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 118 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-02-16 13:56:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 240. [2022-02-16 13:56:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6108786610878663) internal successors, (624), 239 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 624 transitions. [2022-02-16 13:56:16,472 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 624 transitions. Word has length 20 [2022-02-16 13:56:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:16,472 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 624 transitions. [2022-02-16 13:56:16,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 624 transitions. [2022-02-16 13:56:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:16,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:16,473 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:16,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Ended with exit code 0 [2022-02-16 13:56:16,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2022-02-16 13:56:16,687 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 134864996, now seen corresponding path program 458 times [2022-02-16 13:56:16,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:16,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988861548] [2022-02-16 13:56:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:16,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:16,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:16,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988861548] [2022-02-16 13:56:16,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988861548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:16,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975501819] [2022-02-16 13:56:16,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:56:16,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:16,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:16,830 INFO L229 MonitoredProcess]: Starting monitored process 459 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:16,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-02-16 13:56:17,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:17,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:17,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:17,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:17,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:56:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:17,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:17,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:17,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:17,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975501819] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:17,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:17,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:56:17,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497953855] [2022-02-16 13:56:17,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:17,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:17,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:17,670 INFO L87 Difference]: Start difference. First operand 240 states and 624 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:18,186 INFO L93 Difference]: Finished difference Result 416 states and 960 transitions. [2022-02-16 13:56:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:56:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:18,186 INFO L225 Difference]: With dead ends: 416 [2022-02-16 13:56:18,186 INFO L226 Difference]: Without dead ends: 415 [2022-02-16 13:56:18,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:56:18,187 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 152 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:18,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 129 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-02-16 13:56:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 239. [2022-02-16 13:56:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6092436974789917) internal successors, (621), 238 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 621 transitions. [2022-02-16 13:56:18,190 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 621 transitions. Word has length 20 [2022-02-16 13:56:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:18,190 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 621 transitions. [2022-02-16 13:56:18,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 621 transitions. [2022-02-16 13:56:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:18,190 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:18,190 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:18,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:18,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2022-02-16 13:56:18,391 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:18,391 INFO L85 PathProgramCache]: Analyzing trace with hash 722610318, now seen corresponding path program 459 times [2022-02-16 13:56:18,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:18,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960948258] [2022-02-16 13:56:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:18,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:18,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:18,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960948258] [2022-02-16 13:56:18,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960948258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:18,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005412352] [2022-02-16 13:56:18,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:56:18,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:18,480 INFO L229 MonitoredProcess]: Starting monitored process 460 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:18,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-02-16 13:56:18,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:56:18,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:18,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:18,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:19,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:19,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:19,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:19,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:19,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005412352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:19,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:19,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:56:19,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606035323] [2022-02-16 13:56:19,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:56:19,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:19,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:56:19,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:56:19,287 INFO L87 Difference]: Start difference. First operand 239 states and 621 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:19,749 INFO L93 Difference]: Finished difference Result 403 states and 943 transitions. [2022-02-16 13:56:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:19,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:19,750 INFO L225 Difference]: With dead ends: 403 [2022-02-16 13:56:19,750 INFO L226 Difference]: Without dead ends: 401 [2022-02-16 13:56:19,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:56:19,750 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:19,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 126 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-16 13:56:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 238. [2022-02-16 13:56:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.607594936708861) internal successors, (618), 237 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 618 transitions. [2022-02-16 13:56:19,753 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 618 transitions. Word has length 20 [2022-02-16 13:56:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:19,753 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 618 transitions. [2022-02-16 13:56:19,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 618 transitions. [2022-02-16 13:56:19,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:19,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:19,753 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:19,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:19,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:19,963 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:19,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash -606087102, now seen corresponding path program 460 times [2022-02-16 13:56:19,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:19,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266316452] [2022-02-16 13:56:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:19,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:20,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:20,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266316452] [2022-02-16 13:56:20,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266316452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:20,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724689110] [2022-02-16 13:56:20,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:56:20,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:20,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:20,047 INFO L229 MonitoredProcess]: Starting monitored process 461 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:20,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-02-16 13:56:20,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:56:20,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:20,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:20,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:20,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:20,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:20,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:20,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:20,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724689110] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:20,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:20,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:56:20,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693177825] [2022-02-16 13:56:20,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:20,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:56:20,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:56:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:56:20,776 INFO L87 Difference]: Start difference. First operand 238 states and 618 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:21,108 INFO L93 Difference]: Finished difference Result 413 states and 951 transitions. [2022-02-16 13:56:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:21,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:21,109 INFO L225 Difference]: With dead ends: 413 [2022-02-16 13:56:21,109 INFO L226 Difference]: Without dead ends: 410 [2022-02-16 13:56:21,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:56:21,109 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 180 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:21,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 94 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-16 13:56:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 236. [2022-02-16 13:56:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6127659574468085) internal successors, (614), 235 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 614 transitions. [2022-02-16 13:56:21,112 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 614 transitions. Word has length 20 [2022-02-16 13:56:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:21,112 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 614 transitions. [2022-02-16 13:56:21,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 614 transitions. [2022-02-16 13:56:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:21,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:21,113 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:21,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Ended with exit code 0 [2022-02-16 13:56:21,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:21,313 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:21,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1638620440, now seen corresponding path program 461 times [2022-02-16 13:56:21,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:21,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158664240] [2022-02-16 13:56:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:21,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:21,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:21,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158664240] [2022-02-16 13:56:21,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158664240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:21,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360430348] [2022-02-16 13:56:21,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:56:21,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:21,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:21,418 INFO L229 MonitoredProcess]: Starting monitored process 462 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:21,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-02-16 13:56:21,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:21,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:21,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:21,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:22,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:56:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:22,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:22,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:22,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:22,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360430348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:22,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:22,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:22,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651683384] [2022-02-16 13:56:22,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:22,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:22,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:22,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:22,244 INFO L87 Difference]: Start difference. First operand 236 states and 614 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:22,539 INFO L93 Difference]: Finished difference Result 421 states and 972 transitions. [2022-02-16 13:56:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:22,539 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:22,540 INFO L225 Difference]: With dead ends: 421 [2022-02-16 13:56:22,540 INFO L226 Difference]: Without dead ends: 421 [2022-02-16 13:56:22,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:56:22,541 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:22,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 123 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-02-16 13:56:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 240. [2022-02-16 13:56:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6192468619246863) internal successors, (626), 239 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2022-02-16 13:56:22,544 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 20 [2022-02-16 13:56:22,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:22,544 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2022-02-16 13:56:22,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2022-02-16 13:56:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:22,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:22,545 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:22,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:22,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:22,751 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:22,751 INFO L85 PathProgramCache]: Analyzing trace with hash -924087584, now seen corresponding path program 462 times [2022-02-16 13:56:22,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:22,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838992141] [2022-02-16 13:56:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:22,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:22,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:22,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838992141] [2022-02-16 13:56:22,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838992141] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:22,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138552568] [2022-02-16 13:56:22,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:56:22,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:22,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:22,857 INFO L229 MonitoredProcess]: Starting monitored process 463 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:22,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-02-16 13:56:23,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:56:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:23,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:23,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:56:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:23,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:23,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:23,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:23,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138552568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:23,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:23,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:56:23,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27148583] [2022-02-16 13:56:23,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:23,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:23,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:23,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:23,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:23,639 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:23,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:23,952 INFO L93 Difference]: Finished difference Result 422 states and 972 transitions. [2022-02-16 13:56:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:56:23,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:23,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:23,953 INFO L225 Difference]: With dead ends: 422 [2022-02-16 13:56:23,953 INFO L226 Difference]: Without dead ends: 421 [2022-02-16 13:56:23,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:56:23,953 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:23,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 100 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-02-16 13:56:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 239. [2022-02-16 13:56:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6176470588235294) internal successors, (623), 238 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 623 transitions. [2022-02-16 13:56:23,956 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 623 transitions. Word has length 20 [2022-02-16 13:56:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:23,957 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 623 transitions. [2022-02-16 13:56:23,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 623 transitions. [2022-02-16 13:56:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:23,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:23,957 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:23,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:24,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2022-02-16 13:56:24,175 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:24,175 INFO L85 PathProgramCache]: Analyzing trace with hash -336342262, now seen corresponding path program 463 times [2022-02-16 13:56:24,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:24,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309925477] [2022-02-16 13:56:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:24,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:24,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:24,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309925477] [2022-02-16 13:56:24,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309925477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:24,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374229372] [2022-02-16 13:56:24,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:56:24,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:24,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:24,252 INFO L229 MonitoredProcess]: Starting monitored process 464 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:24,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-02-16 13:56:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:24,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:24,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:24,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:24,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:24,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:24,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:24,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374229372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:24,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:24,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:56:24,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132387794] [2022-02-16 13:56:24,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:24,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:56:24,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:24,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:56:24,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:56:24,988 INFO L87 Difference]: Start difference. First operand 239 states and 623 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:25,244 INFO L93 Difference]: Finished difference Result 409 states and 955 transitions. [2022-02-16 13:56:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:25,245 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:25,245 INFO L225 Difference]: With dead ends: 409 [2022-02-16 13:56:25,245 INFO L226 Difference]: Without dead ends: 407 [2022-02-16 13:56:25,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:56:25,245 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:25,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 93 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-16 13:56:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 237. [2022-02-16 13:56:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6228813559322033) internal successors, (619), 236 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 619 transitions. [2022-02-16 13:56:25,248 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 619 transitions. Word has length 20 [2022-02-16 13:56:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:25,248 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 619 transitions. [2022-02-16 13:56:25,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 619 transitions. [2022-02-16 13:56:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:25,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:25,249 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:25,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:25,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-02-16 13:56:25,466 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:25,466 INFO L85 PathProgramCache]: Analyzing trace with hash 523504812, now seen corresponding path program 464 times [2022-02-16 13:56:25,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:25,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996061193] [2022-02-16 13:56:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:25,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:25,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:25,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996061193] [2022-02-16 13:56:25,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996061193] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:25,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68626292] [2022-02-16 13:56:25,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:56:25,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:25,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:25,537 INFO L229 MonitoredProcess]: Starting monitored process 465 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:25,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-02-16 13:56:25,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:25,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:25,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:26,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:56:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:26,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:26,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:26,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:26,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68626292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:26,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:26,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:26,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759951215] [2022-02-16 13:56:26,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:26,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:26,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:26,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:26,254 INFO L87 Difference]: Start difference. First operand 237 states and 619 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:26,604 INFO L93 Difference]: Finished difference Result 460 states and 1035 transitions. [2022-02-16 13:56:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:56:26,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:26,605 INFO L225 Difference]: With dead ends: 460 [2022-02-16 13:56:26,605 INFO L226 Difference]: Without dead ends: 460 [2022-02-16 13:56:26,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:56:26,605 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:26,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 125 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-02-16 13:56:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 243. [2022-02-16 13:56:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6404958677685952) internal successors, (639), 242 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 639 transitions. [2022-02-16 13:56:26,608 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 639 transitions. Word has length 20 [2022-02-16 13:56:26,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:26,608 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 639 transitions. [2022-02-16 13:56:26,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 639 transitions. [2022-02-16 13:56:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:26,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:26,609 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:26,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Ended with exit code 0 [2022-02-16 13:56:26,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-02-16 13:56:26,826 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1238037668, now seen corresponding path program 465 times [2022-02-16 13:56:26,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:26,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078686058] [2022-02-16 13:56:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:26,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:26,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:26,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078686058] [2022-02-16 13:56:26,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078686058] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:26,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958546871] [2022-02-16 13:56:26,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:56:26,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:26,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:26,916 INFO L229 MonitoredProcess]: Starting monitored process 466 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:26,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-02-16 13:56:27,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:56:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:27,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2022-02-16 13:56:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:27,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:27,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:27,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:27,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958546871] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:27,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:27,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:56:27,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102147145] [2022-02-16 13:56:27,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:27,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:27,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:27,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:27,945 INFO L87 Difference]: Start difference. First operand 243 states and 639 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:28,632 INFO L93 Difference]: Finished difference Result 470 states and 1043 transitions. [2022-02-16 13:56:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:56:28,632 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:28,633 INFO L225 Difference]: With dead ends: 470 [2022-02-16 13:56:28,633 INFO L226 Difference]: Without dead ends: 469 [2022-02-16 13:56:28,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:56:28,633 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 176 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:28,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 181 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-02-16 13:56:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 240. [2022-02-16 13:56:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6401673640167362) internal successors, (631), 239 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 631 transitions. [2022-02-16 13:56:28,637 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 631 transitions. Word has length 20 [2022-02-16 13:56:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:28,637 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 631 transitions. [2022-02-16 13:56:28,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 631 transitions. [2022-02-16 13:56:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:28,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:28,637 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:28,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:28,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable466,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:28,854 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:28,855 INFO L85 PathProgramCache]: Analyzing trace with hash 731798120, now seen corresponding path program 466 times [2022-02-16 13:56:28,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:28,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881657267] [2022-02-16 13:56:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:28,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:28,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:28,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881657267] [2022-02-16 13:56:28,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881657267] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:28,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304871146] [2022-02-16 13:56:28,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:56:28,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:28,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:28,933 INFO L229 MonitoredProcess]: Starting monitored process 467 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:28,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-02-16 13:56:29,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:56:29,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:29,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:29,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:56:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:29,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:29,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:29,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:29,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304871146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:29,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:29,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:29,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668058273] [2022-02-16 13:56:29,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:29,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:29,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:29,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:29,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:29,791 INFO L87 Difference]: Start difference. First operand 240 states and 631 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:30,027 INFO L93 Difference]: Finished difference Result 449 states and 1020 transitions. [2022-02-16 13:56:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:30,027 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:30,027 INFO L225 Difference]: With dead ends: 449 [2022-02-16 13:56:30,028 INFO L226 Difference]: Without dead ends: 449 [2022-02-16 13:56:30,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:56:30,028 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 197 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:30,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 111 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-16 13:56:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 240. [2022-02-16 13:56:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6485355648535567) internal successors, (633), 239 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 633 transitions. [2022-02-16 13:56:30,031 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 633 transitions. Word has length 20 [2022-02-16 13:56:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:30,031 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 633 transitions. [2022-02-16 13:56:30,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 633 transitions. [2022-02-16 13:56:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:30,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:30,031 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:30,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:30,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:30,249 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:30,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1421520044, now seen corresponding path program 467 times [2022-02-16 13:56:30,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:30,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323655581] [2022-02-16 13:56:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:30,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:30,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:30,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323655581] [2022-02-16 13:56:30,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323655581] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:30,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050502823] [2022-02-16 13:56:30,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:56:30,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:30,350 INFO L229 MonitoredProcess]: Starting monitored process 468 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:30,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-02-16 13:56:30,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:56:30,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:30,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:56:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:31,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:31,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:31,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:31,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050502823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:31,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:31,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:31,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233614218] [2022-02-16 13:56:31,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:31,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:31,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:31,339 INFO L87 Difference]: Start difference. First operand 240 states and 633 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:31,785 INFO L93 Difference]: Finished difference Result 447 states and 1017 transitions. [2022-02-16 13:56:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:56:31,785 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:31,785 INFO L225 Difference]: With dead ends: 447 [2022-02-16 13:56:31,786 INFO L226 Difference]: Without dead ends: 447 [2022-02-16 13:56:31,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:56:31,786 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:31,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 126 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-16 13:56:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 238. [2022-02-16 13:56:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.632911392405063) internal successors, (624), 237 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 624 transitions. [2022-02-16 13:56:31,789 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 624 transitions. Word has length 20 [2022-02-16 13:56:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:31,789 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 624 transitions. [2022-02-16 13:56:31,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 624 transitions. [2022-02-16 13:56:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:31,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:31,789 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:31,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:31,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2022-02-16 13:56:31,990 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:31,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1220655200, now seen corresponding path program 468 times [2022-02-16 13:56:31,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:31,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004935766] [2022-02-16 13:56:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:31,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:32,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:32,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004935766] [2022-02-16 13:56:32,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004935766] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:32,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601049848] [2022-02-16 13:56:32,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:56:32,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:32,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:32,097 INFO L229 MonitoredProcess]: Starting monitored process 469 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:32,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-02-16 13:56:32,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:56:32,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:32,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:56:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:32,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:32,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:32,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:32,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601049848] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:32,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:32,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:56:32,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434370245] [2022-02-16 13:56:32,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:32,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:32,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:32,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:32,957 INFO L87 Difference]: Start difference. First operand 238 states and 624 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:33,531 INFO L93 Difference]: Finished difference Result 451 states and 1023 transitions. [2022-02-16 13:56:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:56:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:33,532 INFO L225 Difference]: With dead ends: 451 [2022-02-16 13:56:33,532 INFO L226 Difference]: Without dead ends: 449 [2022-02-16 13:56:33,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:56:33,532 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 189 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:33,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 173 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-16 13:56:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 241. [2022-02-16 13:56:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.629166666666667) internal successors, (631), 240 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 631 transitions. [2022-02-16 13:56:33,535 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 631 transitions. Word has length 20 [2022-02-16 13:56:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:33,535 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 631 transitions. [2022-02-16 13:56:33,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 631 transitions. [2022-02-16 13:56:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:33,536 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:33,536 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:33,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:33,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:33,736 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:33,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:33,737 INFO L85 PathProgramCache]: Analyzing trace with hash -105557404, now seen corresponding path program 469 times [2022-02-16 13:56:33,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:33,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195975843] [2022-02-16 13:56:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:33,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:33,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:33,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195975843] [2022-02-16 13:56:33,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195975843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:33,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508206702] [2022-02-16 13:56:33,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:56:33,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:33,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:33,846 INFO L229 MonitoredProcess]: Starting monitored process 470 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:33,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-02-16 13:56:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:34,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:34,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:34,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:56:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:34,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:34,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:34,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:34,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508206702] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:34,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:34,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:34,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955301813] [2022-02-16 13:56:34,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:34,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:34,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:34,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:34,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:34,810 INFO L87 Difference]: Start difference. First operand 241 states and 631 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:35,320 INFO L93 Difference]: Finished difference Result 440 states and 1013 transitions. [2022-02-16 13:56:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:56:35,320 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:35,321 INFO L225 Difference]: With dead ends: 440 [2022-02-16 13:56:35,321 INFO L226 Difference]: Without dead ends: 440 [2022-02-16 13:56:35,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:56:35,321 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:35,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 128 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-16 13:56:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 237. [2022-02-16 13:56:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6228813559322033) internal successors, (619), 236 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 619 transitions. [2022-02-16 13:56:35,324 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 619 transitions. Word has length 20 [2022-02-16 13:56:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:35,324 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 619 transitions. [2022-02-16 13:56:35,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 619 transitions. [2022-02-16 13:56:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:35,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:35,325 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:35,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:35,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:35,539 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash 753590158, now seen corresponding path program 470 times [2022-02-16 13:56:35,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:35,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689482249] [2022-02-16 13:56:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:35,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:35,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:35,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689482249] [2022-02-16 13:56:35,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689482249] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:35,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484305367] [2022-02-16 13:56:35,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:56:35,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:35,628 INFO L229 MonitoredProcess]: Starting monitored process 471 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:35,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-02-16 13:56:35,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:35,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:35,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:36,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:36,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:36,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:36,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:36,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484305367] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:36,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:36,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:56:36,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589849960] [2022-02-16 13:56:36,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:36,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:56:36,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:36,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:56:36,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:56:36,474 INFO L87 Difference]: Start difference. First operand 237 states and 619 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:36,709 INFO L93 Difference]: Finished difference Result 409 states and 955 transitions. [2022-02-16 13:56:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:36,709 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:36,709 INFO L225 Difference]: With dead ends: 409 [2022-02-16 13:56:36,709 INFO L226 Difference]: Without dead ends: 406 [2022-02-16 13:56:36,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:56:36,710 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:36,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 123 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-02-16 13:56:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 238. [2022-02-16 13:56:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6202531645569622) internal successors, (621), 237 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 621 transitions. [2022-02-16 13:56:36,713 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 621 transitions. Word has length 20 [2022-02-16 13:56:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:36,713 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 621 transitions. [2022-02-16 13:56:36,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 621 transitions. [2022-02-16 13:56:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:36,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:36,713 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:36,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Ended with exit code 0 [2022-02-16 13:56:36,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:36,930 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash 961883466, now seen corresponding path program 471 times [2022-02-16 13:56:36,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:36,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292607224] [2022-02-16 13:56:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:36,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:37,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:37,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292607224] [2022-02-16 13:56:37,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292607224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:37,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070004779] [2022-02-16 13:56:37,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:56:37,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:37,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:37,041 INFO L229 MonitoredProcess]: Starting monitored process 472 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:37,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-02-16 13:56:37,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:56:37,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:37,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:56:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:37,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:37,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:37,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:37,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070004779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:37,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:37,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:56:37,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049654801] [2022-02-16 13:56:37,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:37,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:37,823 INFO L87 Difference]: Start difference. First operand 238 states and 621 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:38,118 INFO L93 Difference]: Finished difference Result 422 states and 972 transitions. [2022-02-16 13:56:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:56:38,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:38,119 INFO L225 Difference]: With dead ends: 422 [2022-02-16 13:56:38,119 INFO L226 Difference]: Without dead ends: 420 [2022-02-16 13:56:38,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:56:38,119 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 190 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:38,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 92 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:38,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-16 13:56:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 241. [2022-02-16 13:56:38,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6166666666666667) internal successors, (628), 240 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 628 transitions. [2022-02-16 13:56:38,122 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 628 transitions. Word has length 20 [2022-02-16 13:56:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:38,122 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 628 transitions. [2022-02-16 13:56:38,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 628 transitions. [2022-02-16 13:56:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:38,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:38,123 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:38,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:38,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,472 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:38,340 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2076981262, now seen corresponding path program 472 times [2022-02-16 13:56:38,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:38,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954074047] [2022-02-16 13:56:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:38,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:38,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:38,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954074047] [2022-02-16 13:56:38,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954074047] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:38,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551428346] [2022-02-16 13:56:38,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:56:38,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:38,427 INFO L229 MonitoredProcess]: Starting monitored process 473 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:38,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-02-16 13:56:38,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:56:38,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:38,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:39,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:56:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:39,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:39,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:39,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:39,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551428346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:39,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:39,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:39,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670792561] [2022-02-16 13:56:39,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:39,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:39,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:39,311 INFO L87 Difference]: Start difference. First operand 241 states and 628 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:39,647 INFO L93 Difference]: Finished difference Result 409 states and 958 transitions. [2022-02-16 13:56:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:39,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:39,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:39,648 INFO L225 Difference]: With dead ends: 409 [2022-02-16 13:56:39,648 INFO L226 Difference]: Without dead ends: 409 [2022-02-16 13:56:39,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:56:39,649 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:39,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 110 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-16 13:56:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 236. [2022-02-16 13:56:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6127659574468085) internal successors, (614), 235 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 614 transitions. [2022-02-16 13:56:39,652 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 614 transitions. Word has length 20 [2022-02-16 13:56:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:39,652 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 614 transitions. [2022-02-16 13:56:39,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 614 transitions. [2022-02-16 13:56:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:39,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:39,653 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:39,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:39,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,473 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:39,871 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1177920450, now seen corresponding path program 473 times [2022-02-16 13:56:39,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:39,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190282959] [2022-02-16 13:56:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:39,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:39,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:39,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190282959] [2022-02-16 13:56:39,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190282959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:39,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613191266] [2022-02-16 13:56:39,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:56:39,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:39,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:39,953 INFO L229 MonitoredProcess]: Starting monitored process 474 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:39,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-02-16 13:56:40,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:40,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:40,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:40,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:40,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:40,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:40,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613191266] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:40,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:40,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:56:40,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687570150] [2022-02-16 13:56:40,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:40,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:56:40,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:40,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:56:40,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:56:40,774 INFO L87 Difference]: Start difference. First operand 236 states and 614 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:41,111 INFO L93 Difference]: Finished difference Result 445 states and 1002 transitions. [2022-02-16 13:56:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:41,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:41,112 INFO L225 Difference]: With dead ends: 445 [2022-02-16 13:56:41,112 INFO L226 Difference]: Without dead ends: 441 [2022-02-16 13:56:41,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:56:41,112 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 190 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:41,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 102 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-02-16 13:56:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 237. [2022-02-16 13:56:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.610169491525424) internal successors, (616), 236 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 616 transitions. [2022-02-16 13:56:41,115 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 616 transitions. Word has length 20 [2022-02-16 13:56:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:41,115 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 616 transitions. [2022-02-16 13:56:41,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 616 transitions. [2022-02-16 13:56:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:41,116 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:41,116 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:41,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:41,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-02-16 13:56:41,316 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:41,317 INFO L85 PathProgramCache]: Analyzing trace with hash -519343550, now seen corresponding path program 474 times [2022-02-16 13:56:41,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:41,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729584854] [2022-02-16 13:56:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:41,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:41,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:41,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729584854] [2022-02-16 13:56:41,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729584854] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:41,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613601767] [2022-02-16 13:56:41,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:56:41,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:41,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:41,418 INFO L229 MonitoredProcess]: Starting monitored process 475 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:41,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-02-16 13:56:41,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:56:41,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:41,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:41,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:42,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:42,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:42,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:42,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:42,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613601767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:42,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:42,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:56:42,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973791331] [2022-02-16 13:56:42,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:42,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:56:42,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:56:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:56:42,373 INFO L87 Difference]: Start difference. First operand 237 states and 616 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:42,794 INFO L93 Difference]: Finished difference Result 434 states and 992 transitions. [2022-02-16 13:56:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:42,795 INFO L225 Difference]: With dead ends: 434 [2022-02-16 13:56:42,795 INFO L226 Difference]: Without dead ends: 431 [2022-02-16 13:56:42,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:56:42,795 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:42,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 120 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-16 13:56:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 238. [2022-02-16 13:56:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.607594936708861) internal successors, (618), 237 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 618 transitions. [2022-02-16 13:56:42,799 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 618 transitions. Word has length 20 [2022-02-16 13:56:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:42,799 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 618 transitions. [2022-02-16 13:56:42,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 618 transitions. [2022-02-16 13:56:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:42,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:42,799 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:42,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Ended with exit code 0 [2022-02-16 13:56:43,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 475 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2022-02-16 13:56:43,007 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:43,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:43,007 INFO L85 PathProgramCache]: Analyzing trace with hash -311050242, now seen corresponding path program 475 times [2022-02-16 13:56:43,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:43,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117053366] [2022-02-16 13:56:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:43,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:43,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:43,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117053366] [2022-02-16 13:56:43,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117053366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:43,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245288486] [2022-02-16 13:56:43,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:56:43,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:43,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:43,125 INFO L229 MonitoredProcess]: Starting monitored process 476 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:43,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-02-16 13:56:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:43,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:43,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:43,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:56:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:43,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:43,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:43,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:43,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245288486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:43,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:43,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:56:43,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353977498] [2022-02-16 13:56:43,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:43,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:43,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:43,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:43,880 INFO L87 Difference]: Start difference. First operand 238 states and 618 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:44,349 INFO L93 Difference]: Finished difference Result 447 states and 1009 transitions. [2022-02-16 13:56:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:56:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:44,350 INFO L225 Difference]: With dead ends: 447 [2022-02-16 13:56:44,350 INFO L226 Difference]: Without dead ends: 445 [2022-02-16 13:56:44,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:56:44,350 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 190 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:44,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 110 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-02-16 13:56:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 241. [2022-02-16 13:56:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6041666666666665) internal successors, (625), 240 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 625 transitions. [2022-02-16 13:56:44,353 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 625 transitions. Word has length 20 [2022-02-16 13:56:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:44,353 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 625 transitions. [2022-02-16 13:56:44,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 625 transitions. [2022-02-16 13:56:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:44,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:44,354 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:44,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Ended with exit code 0 [2022-02-16 13:56:44,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2022-02-16 13:56:44,554 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:44,555 INFO L85 PathProgramCache]: Analyzing trace with hash 804047554, now seen corresponding path program 476 times [2022-02-16 13:56:44,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:44,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351458289] [2022-02-16 13:56:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:44,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:44,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:44,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351458289] [2022-02-16 13:56:44,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351458289] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:44,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573560175] [2022-02-16 13:56:44,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:56:44,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:44,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:44,655 INFO L229 MonitoredProcess]: Starting monitored process 477 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:44,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-02-16 13:56:44,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:44,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:44,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:45,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:56:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:45,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:45,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:45,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:45,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573560175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:45,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:45,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:45,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942524860] [2022-02-16 13:56:45,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:45,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:45,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:45,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:45,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:45,551 INFO L87 Difference]: Start difference. First operand 241 states and 625 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:45,881 INFO L93 Difference]: Finished difference Result 434 states and 995 transitions. [2022-02-16 13:56:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:45,881 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:45,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:45,882 INFO L225 Difference]: With dead ends: 434 [2022-02-16 13:56:45,882 INFO L226 Difference]: Without dead ends: 434 [2022-02-16 13:56:45,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:56:45,882 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:45,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 109 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-02-16 13:56:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 235. [2022-02-16 13:56:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6025641025641026) internal successors, (609), 234 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 609 transitions. [2022-02-16 13:56:45,887 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 609 transitions. Word has length 20 [2022-02-16 13:56:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:45,887 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 609 transitions. [2022-02-16 13:56:45,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 609 transitions. [2022-02-16 13:56:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:45,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:45,887 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:45,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:46,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2022-02-16 13:56:46,108 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1907366868, now seen corresponding path program 477 times [2022-02-16 13:56:46,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:46,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946143621] [2022-02-16 13:56:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:46,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:46,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:46,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946143621] [2022-02-16 13:56:46,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946143621] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:46,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605166429] [2022-02-16 13:56:46,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:56:46,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:46,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:46,206 INFO L229 MonitoredProcess]: Starting monitored process 478 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:46,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-02-16 13:56:46,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:56:46,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:46,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:56:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:46,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:47,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:47,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:47,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605166429] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:47,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:47,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:47,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923971020] [2022-02-16 13:56:47,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:47,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:47,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:47,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:47,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:47,177 INFO L87 Difference]: Start difference. First operand 235 states and 609 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:47,455 INFO L93 Difference]: Finished difference Result 349 states and 825 transitions. [2022-02-16 13:56:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:47,456 INFO L225 Difference]: With dead ends: 349 [2022-02-16 13:56:47,456 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:56:47,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:56:47,456 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:47,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 97 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:56:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 240. [2022-02-16 13:56:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6150627615062763) internal successors, (625), 239 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 625 transitions. [2022-02-16 13:56:47,460 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 625 transitions. Word has length 20 [2022-02-16 13:56:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:47,460 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 625 transitions. [2022-02-16 13:56:47,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 625 transitions. [2022-02-16 13:56:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:47,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:47,460 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:47,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:47,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2022-02-16 13:56:47,684 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1192834012, now seen corresponding path program 478 times [2022-02-16 13:56:47,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:47,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975363858] [2022-02-16 13:56:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:47,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:47,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:47,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975363858] [2022-02-16 13:56:47,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975363858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:47,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361820780] [2022-02-16 13:56:47,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:56:47,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:47,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:47,772 INFO L229 MonitoredProcess]: Starting monitored process 479 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:47,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-02-16 13:56:48,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:56:48,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:48,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:48,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:56:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:48,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:48,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:48,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:48,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361820780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:48,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:48,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:56:48,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099663488] [2022-02-16 13:56:48,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:48,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:48,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:48,724 INFO L87 Difference]: Start difference. First operand 240 states and 625 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:49,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:49,049 INFO L93 Difference]: Finished difference Result 350 states and 825 transitions. [2022-02-16 13:56:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:56:49,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:49,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:49,050 INFO L225 Difference]: With dead ends: 350 [2022-02-16 13:56:49,050 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:56:49,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:56:49,050 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:49,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 100 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:56:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 239. [2022-02-16 13:56:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6134453781512605) internal successors, (622), 238 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 622 transitions. [2022-02-16 13:56:49,053 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 622 transitions. Word has length 20 [2022-02-16 13:56:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:49,053 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 622 transitions. [2022-02-16 13:56:49,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 622 transitions. [2022-02-16 13:56:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:49,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:49,053 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:49,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:49,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,479 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:49,254 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:49,254 INFO L85 PathProgramCache]: Analyzing trace with hash -605088690, now seen corresponding path program 479 times [2022-02-16 13:56:49,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:49,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429546397] [2022-02-16 13:56:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:49,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:49,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:49,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429546397] [2022-02-16 13:56:49,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429546397] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:49,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172730356] [2022-02-16 13:56:49,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:56:49,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:49,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:49,347 INFO L229 MonitoredProcess]: Starting monitored process 480 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:49,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-02-16 13:56:49,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:49,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:49,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:56:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:50,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:50,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:50,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:50,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172730356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:50,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:50,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:56:50,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204113407] [2022-02-16 13:56:50,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:50,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:56:50,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:50,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:56:50,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:56:50,248 INFO L87 Difference]: Start difference. First operand 239 states and 622 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:50,553 INFO L93 Difference]: Finished difference Result 337 states and 808 transitions. [2022-02-16 13:56:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:50,554 INFO L225 Difference]: With dead ends: 337 [2022-02-16 13:56:50,554 INFO L226 Difference]: Without dead ends: 335 [2022-02-16 13:56:50,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:56:50,554 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:50,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 76 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-16 13:56:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 237. [2022-02-16 13:56:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6186440677966103) internal successors, (618), 236 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 618 transitions. [2022-02-16 13:56:50,557 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 618 transitions. Word has length 20 [2022-02-16 13:56:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:50,557 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 618 transitions. [2022-02-16 13:56:50,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 618 transitions. [2022-02-16 13:56:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:50,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:50,558 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:50,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:50,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,480 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:50,767 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:50,767 INFO L85 PathProgramCache]: Analyzing trace with hash 254758384, now seen corresponding path program 480 times [2022-02-16 13:56:50,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:50,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315029353] [2022-02-16 13:56:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:50,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:50,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:50,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315029353] [2022-02-16 13:56:50,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315029353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:50,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019207191] [2022-02-16 13:56:50,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:56:50,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:50,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:50,878 INFO L229 MonitoredProcess]: Starting monitored process 481 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:50,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-02-16 13:56:51,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:56:51,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:51,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:51,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:51,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:56:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:51,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:51,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:51,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:51,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019207191] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:51,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:51,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:51,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702071412] [2022-02-16 13:56:51,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:51,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:51,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:51,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:51,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:51,884 INFO L87 Difference]: Start difference. First operand 237 states and 618 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:52,221 INFO L93 Difference]: Finished difference Result 390 states and 891 transitions. [2022-02-16 13:56:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:56:52,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:52,222 INFO L225 Difference]: With dead ends: 390 [2022-02-16 13:56:52,222 INFO L226 Difference]: Without dead ends: 390 [2022-02-16 13:56:52,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:56:52,222 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 230 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:52,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 106 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-16 13:56:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 243. [2022-02-16 13:56:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6363636363636362) internal successors, (638), 242 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 638 transitions. [2022-02-16 13:56:52,225 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 638 transitions. Word has length 20 [2022-02-16 13:56:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:52,225 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 638 transitions. [2022-02-16 13:56:52,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 638 transitions. [2022-02-16 13:56:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:52,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:52,225 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:52,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,481 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:52,435 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:52,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:52,435 INFO L85 PathProgramCache]: Analyzing trace with hash 969291240, now seen corresponding path program 481 times [2022-02-16 13:56:52,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:52,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60877110] [2022-02-16 13:56:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:52,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:52,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:52,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60877110] [2022-02-16 13:56:52,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60877110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:52,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878391684] [2022-02-16 13:56:52,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:56:52,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:52,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:52,539 INFO L229 MonitoredProcess]: Starting monitored process 482 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:52,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-02-16 13:56:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:52,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:52,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:53,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 81 [2022-02-16 13:56:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:53,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:53,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:53,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:53,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878391684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:53,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:53,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:56:53,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537831264] [2022-02-16 13:56:53,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:53,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:53,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:53,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:53,598 INFO L87 Difference]: Start difference. First operand 243 states and 638 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:54,002 INFO L93 Difference]: Finished difference Result 400 states and 899 transitions. [2022-02-16 13:56:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:56:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:54,002 INFO L225 Difference]: With dead ends: 400 [2022-02-16 13:56:54,002 INFO L226 Difference]: Without dead ends: 399 [2022-02-16 13:56:54,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:56:54,003 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 168 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:54,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 171 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-02-16 13:56:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 240. [2022-02-16 13:56:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6359832635983262) internal successors, (630), 239 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 630 transitions. [2022-02-16 13:56:54,006 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 630 transitions. Word has length 20 [2022-02-16 13:56:54,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:54,006 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 630 transitions. [2022-02-16 13:56:54,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 630 transitions. [2022-02-16 13:56:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:54,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:54,006 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:54,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Ended with exit code 0 [2022-02-16 13:56:54,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2022-02-16 13:56:54,208 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:54,208 INFO L85 PathProgramCache]: Analyzing trace with hash 463051692, now seen corresponding path program 482 times [2022-02-16 13:56:54,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:54,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992538439] [2022-02-16 13:56:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:54,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:54,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:54,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992538439] [2022-02-16 13:56:54,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992538439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:54,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380532177] [2022-02-16 13:56:54,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:56:54,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:54,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:54,304 INFO L229 MonitoredProcess]: Starting monitored process 483 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:54,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-02-16 13:56:54,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:56:54,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:54,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:54,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 73 [2022-02-16 13:56:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:54,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:54,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:54,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:55,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380532177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:55,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:55,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:55,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100532730] [2022-02-16 13:56:55,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:55,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:55,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:55,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:55,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:55,084 INFO L87 Difference]: Start difference. First operand 240 states and 630 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:55,273 INFO L93 Difference]: Finished difference Result 379 states and 876 transitions. [2022-02-16 13:56:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:56:55,273 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:55,274 INFO L225 Difference]: With dead ends: 379 [2022-02-16 13:56:55,274 INFO L226 Difference]: Without dead ends: 379 [2022-02-16 13:56:55,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:56:55,274 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 127 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:55,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 124 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-02-16 13:56:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 240. [2022-02-16 13:56:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6443514644351462) internal successors, (632), 239 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 632 transitions. [2022-02-16 13:56:55,277 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 632 transitions. Word has length 20 [2022-02-16 13:56:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:55,277 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 632 transitions. [2022-02-16 13:56:55,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 632 transitions. [2022-02-16 13:56:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:55,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:55,277 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:55,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Forceful destruction successful, exit code 0 [2022-02-16 13:56:55,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,483 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:55,494 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1152773616, now seen corresponding path program 483 times [2022-02-16 13:56:55,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:55,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737757546] [2022-02-16 13:56:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:55,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:55,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:55,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737757546] [2022-02-16 13:56:55,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737757546] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:55,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797832527] [2022-02-16 13:56:55,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:56:55,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:55,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:55,572 INFO L229 MonitoredProcess]: Starting monitored process 484 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:55,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-02-16 13:56:55,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:56:55,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:55,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:56,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:56:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:56,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:56,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:56,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:56,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797832527] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:56,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:56,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:56,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671876314] [2022-02-16 13:56:56,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:56,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:56,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:56,600 INFO L87 Difference]: Start difference. First operand 240 states and 632 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:56,927 INFO L93 Difference]: Finished difference Result 389 states and 887 transitions. [2022-02-16 13:56:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:56:56,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:56,928 INFO L225 Difference]: With dead ends: 389 [2022-02-16 13:56:56,928 INFO L226 Difference]: Without dead ends: 389 [2022-02-16 13:56:56,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:56:56,928 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:56,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 105 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:56:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-16 13:56:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 238. [2022-02-16 13:56:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.628691983122363) internal successors, (623), 237 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 623 transitions. [2022-02-16 13:56:56,931 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 623 transitions. Word has length 20 [2022-02-16 13:56:56,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:56,931 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 623 transitions. [2022-02-16 13:56:56,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 623 transitions. [2022-02-16 13:56:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:56,932 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:56,932 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:56,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Ended with exit code 0 [2022-02-16 13:56:57,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,484 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:57,132 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1489401628, now seen corresponding path program 484 times [2022-02-16 13:56:57,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:57,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193931400] [2022-02-16 13:56:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:57,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:57,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:57,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193931400] [2022-02-16 13:56:57,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193931400] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:57,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059261520] [2022-02-16 13:56:57,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:56:57,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:57,234 INFO L229 MonitoredProcess]: Starting monitored process 485 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:57,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-02-16 13:56:57,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:56:57,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:57,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:56:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:57,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:58,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:58,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:58,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059261520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:58,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:58,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:56:58,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253053830] [2022-02-16 13:56:58,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:58,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:56:58,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:56:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:56:58,236 INFO L87 Difference]: Start difference. First operand 238 states and 623 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:56:58,591 INFO L93 Difference]: Finished difference Result 381 states and 879 transitions. [2022-02-16 13:56:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:56:58,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:56:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:56:58,592 INFO L225 Difference]: With dead ends: 381 [2022-02-16 13:56:58,592 INFO L226 Difference]: Without dead ends: 379 [2022-02-16 13:56:58,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:56:58,593 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 191 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:56:58,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 88 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:56:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-02-16 13:56:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 241. [2022-02-16 13:56:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.625) internal successors, (630), 240 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 630 transitions. [2022-02-16 13:56:58,596 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 630 transitions. Word has length 20 [2022-02-16 13:56:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:56:58,596 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 630 transitions. [2022-02-16 13:56:58,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:56:58,596 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 630 transitions. [2022-02-16 13:56:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:56:58,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:56:58,596 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:56:58,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Ended with exit code 0 [2022-02-16 13:56:58,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2022-02-16 13:56:58,798 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:56:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:56:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash -374303832, now seen corresponding path program 485 times [2022-02-16 13:56:58,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:56:58,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465183276] [2022-02-16 13:56:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:56:58,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:56:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:56:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:58,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:56:58,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465183276] [2022-02-16 13:56:58,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465183276] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:56:58,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872466198] [2022-02-16 13:56:58,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:56:58,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:56:58,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:56:58,904 INFO L229 MonitoredProcess]: Starting monitored process 486 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:56:58,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-02-16 13:56:59,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:56:59,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:56:59,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:56:59,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:56:59,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-02-16 13:56:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:59,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:56:59,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:56:59,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:56:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:56:59,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872466198] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:56:59,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:56:59,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:56:59,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759360068] [2022-02-16 13:56:59,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:56:59,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:56:59,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:56:59,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:56:59,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:56:59,867 INFO L87 Difference]: Start difference. First operand 241 states and 630 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:00,208 INFO L93 Difference]: Finished difference Result 370 states and 869 transitions. [2022-02-16 13:57:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:00,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:00,208 INFO L225 Difference]: With dead ends: 370 [2022-02-16 13:57:00,208 INFO L226 Difference]: Without dead ends: 370 [2022-02-16 13:57:00,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:57:00,209 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:00,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 126 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-16 13:57:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 237. [2022-02-16 13:57:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6186440677966103) internal successors, (618), 236 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 618 transitions. [2022-02-16 13:57:00,211 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 618 transitions. Word has length 20 [2022-02-16 13:57:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:00,211 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 618 transitions. [2022-02-16 13:57:00,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 618 transitions. [2022-02-16 13:57:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:00,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:00,212 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:00,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:00,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2022-02-16 13:57:00,420 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash 484843730, now seen corresponding path program 486 times [2022-02-16 13:57:00,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:00,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080354929] [2022-02-16 13:57:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:00,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:00,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:00,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080354929] [2022-02-16 13:57:00,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080354929] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:00,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397343354] [2022-02-16 13:57:00,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:57:00,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:00,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:00,518 INFO L229 MonitoredProcess]: Starting monitored process 487 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:00,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-02-16 13:57:00,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:57:00,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:00,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:01,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:01,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:01,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:01,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:01,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397343354] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:01,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:01,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:57:01,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765433965] [2022-02-16 13:57:01,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:01,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:57:01,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:01,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:57:01,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:57:01,485 INFO L87 Difference]: Start difference. First operand 237 states and 618 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:01,785 INFO L93 Difference]: Finished difference Result 339 states and 811 transitions. [2022-02-16 13:57:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:01,786 INFO L225 Difference]: With dead ends: 339 [2022-02-16 13:57:01,786 INFO L226 Difference]: Without dead ends: 336 [2022-02-16 13:57:01,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:57:01,786 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:01,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 92 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-02-16 13:57:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 238. [2022-02-16 13:57:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6160337552742616) internal successors, (620), 237 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 620 transitions. [2022-02-16 13:57:01,789 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 620 transitions. Word has length 20 [2022-02-16 13:57:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:01,789 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 620 transitions. [2022-02-16 13:57:01,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 620 transitions. [2022-02-16 13:57:01,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:01,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:01,789 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:01,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Ended with exit code 0 [2022-02-16 13:57:01,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2022-02-16 13:57:01,999 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:01,999 INFO L85 PathProgramCache]: Analyzing trace with hash 693137038, now seen corresponding path program 487 times [2022-02-16 13:57:01,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:02,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697610447] [2022-02-16 13:57:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:02,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:02,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:02,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697610447] [2022-02-16 13:57:02,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697610447] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:02,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750045498] [2022-02-16 13:57:02,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:57:02,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:02,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:02,111 INFO L229 MonitoredProcess]: Starting monitored process 488 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:02,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-02-16 13:57:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:02,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:02,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:02,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:57:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:02,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:02,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:02,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:03,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750045498] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:03,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:03,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:03,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861690650] [2022-02-16 13:57:03,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:03,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:03,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:03,109 INFO L87 Difference]: Start difference. First operand 238 states and 620 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:03,350 INFO L93 Difference]: Finished difference Result 352 states and 828 transitions. [2022-02-16 13:57:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:03,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:03,351 INFO L225 Difference]: With dead ends: 352 [2022-02-16 13:57:03,351 INFO L226 Difference]: Without dead ends: 350 [2022-02-16 13:57:03,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:57:03,351 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:03,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 109 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-16 13:57:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 241. [2022-02-16 13:57:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6125) internal successors, (627), 240 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 627 transitions. [2022-02-16 13:57:03,354 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 627 transitions. Word has length 20 [2022-02-16 13:57:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:03,354 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 627 transitions. [2022-02-16 13:57:03,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 627 transitions. [2022-02-16 13:57:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:03,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:03,355 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:03,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Ended with exit code 0 [2022-02-16 13:57:03,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2022-02-16 13:57:03,572 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:03,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:03,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1808234834, now seen corresponding path program 488 times [2022-02-16 13:57:03,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:03,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278872741] [2022-02-16 13:57:03,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:03,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:03,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:03,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278872741] [2022-02-16 13:57:03,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278872741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:03,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201820343] [2022-02-16 13:57:03,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:57:03,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:03,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:03,661 INFO L229 MonitoredProcess]: Starting monitored process 489 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:03,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-02-16 13:57:03,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:03,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:03,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:03,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:04,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:57:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:04,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:04,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:04,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:04,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201820343] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:04,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:04,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:04,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566152283] [2022-02-16 13:57:04,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:04,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:04,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:04,651 INFO L87 Difference]: Start difference. First operand 241 states and 627 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:04,868 INFO L93 Difference]: Finished difference Result 339 states and 814 transitions. [2022-02-16 13:57:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:04,868 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:04,868 INFO L225 Difference]: With dead ends: 339 [2022-02-16 13:57:04,868 INFO L226 Difference]: Without dead ends: 339 [2022-02-16 13:57:04,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:57:04,869 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:04,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 65 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-16 13:57:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 236. [2022-02-16 13:57:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.608510638297872) internal successors, (613), 235 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 613 transitions. [2022-02-16 13:57:04,871 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 613 transitions. Word has length 20 [2022-02-16 13:57:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:04,871 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 613 transitions. [2022-02-16 13:57:04,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 613 transitions. [2022-02-16 13:57:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:04,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:04,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:04,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Ended with exit code 0 [2022-02-16 13:57:05,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,489 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:05,077 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash -381708470, now seen corresponding path program 489 times [2022-02-16 13:57:05,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:05,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424739044] [2022-02-16 13:57:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:05,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:05,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:05,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424739044] [2022-02-16 13:57:05,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424739044] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:05,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678013178] [2022-02-16 13:57:05,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:57:05,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:05,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:05,196 INFO L229 MonitoredProcess]: Starting monitored process 490 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:05,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-02-16 13:57:05,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:57:05,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:05,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:05,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:57:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:06,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:06,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:06,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678013178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:06,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:06,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:06,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387287833] [2022-02-16 13:57:06,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:06,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:06,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:06,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:06,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:06,172 INFO L87 Difference]: Start difference. First operand 236 states and 613 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:06,458 INFO L93 Difference]: Finished difference Result 397 states and 900 transitions. [2022-02-16 13:57:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:06,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:06,459 INFO L225 Difference]: With dead ends: 397 [2022-02-16 13:57:06,459 INFO L226 Difference]: Without dead ends: 397 [2022-02-16 13:57:06,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:57:06,459 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 249 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:06,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 99 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-02-16 13:57:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 244. [2022-02-16 13:57:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6419753086419755) internal successors, (642), 243 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 642 transitions. [2022-02-16 13:57:06,462 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 642 transitions. Word has length 20 [2022-02-16 13:57:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:06,462 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 642 transitions. [2022-02-16 13:57:06,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:06,462 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 642 transitions. [2022-02-16 13:57:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:06,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:06,463 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:06,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:06,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,490 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:06,680 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:06,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash 332824386, now seen corresponding path program 490 times [2022-02-16 13:57:06,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:06,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693534759] [2022-02-16 13:57:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:06,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:06,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:06,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693534759] [2022-02-16 13:57:06,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693534759] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:06,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831955532] [2022-02-16 13:57:06,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:57:06,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:06,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:06,776 INFO L229 MonitoredProcess]: Starting monitored process 491 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:06,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-02-16 13:57:07,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:57:07,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:07,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:07,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:07,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:57:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:07,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:07,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:07,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:07,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831955532] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:07,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:07,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:07,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406815529] [2022-02-16 13:57:07,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:07,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:07,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:07,763 INFO L87 Difference]: Start difference. First operand 244 states and 642 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:08,057 INFO L93 Difference]: Finished difference Result 388 states and 889 transitions. [2022-02-16 13:57:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:57:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:08,058 INFO L225 Difference]: With dead ends: 388 [2022-02-16 13:57:08,058 INFO L226 Difference]: Without dead ends: 387 [2022-02-16 13:57:08,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:57:08,058 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 145 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:08,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 127 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-16 13:57:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 241. [2022-02-16 13:57:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6416666666666666) internal successors, (634), 240 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 634 transitions. [2022-02-16 13:57:08,062 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 634 transitions. Word has length 20 [2022-02-16 13:57:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:08,062 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 634 transitions. [2022-02-16 13:57:08,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 634 transitions. [2022-02-16 13:57:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:08,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:08,063 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:08,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Ended with exit code 0 [2022-02-16 13:57:08,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 491 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2022-02-16 13:57:08,267 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash -173415162, now seen corresponding path program 491 times [2022-02-16 13:57:08,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:08,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550992875] [2022-02-16 13:57:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:08,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:08,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:08,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550992875] [2022-02-16 13:57:08,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550992875] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:08,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853773388] [2022-02-16 13:57:08,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:57:08,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:08,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:08,403 INFO L229 MonitoredProcess]: Starting monitored process 492 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:08,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-02-16 13:57:08,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:57:08,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:08,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:09,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:57:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:09,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:09,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:09,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:09,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853773388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:09,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:09,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:09,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329021571] [2022-02-16 13:57:09,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:09,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:09,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:09,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:09,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:09,591 INFO L87 Difference]: Start difference. First operand 241 states and 634 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:09,929 INFO L93 Difference]: Finished difference Result 405 states and 924 transitions. [2022-02-16 13:57:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:09,930 INFO L225 Difference]: With dead ends: 405 [2022-02-16 13:57:09,931 INFO L226 Difference]: Without dead ends: 405 [2022-02-16 13:57:09,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:57:09,931 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:09,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 134 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-02-16 13:57:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 243. [2022-02-16 13:57:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.65702479338843) internal successors, (643), 242 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 643 transitions. [2022-02-16 13:57:09,935 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 643 transitions. Word has length 20 [2022-02-16 13:57:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:09,935 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 643 transitions. [2022-02-16 13:57:09,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 643 transitions. [2022-02-16 13:57:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:09,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:09,936 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:09,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Ended with exit code 0 [2022-02-16 13:57:10,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,492 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:10,159 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:10,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:10,160 INFO L85 PathProgramCache]: Analyzing trace with hash 516306762, now seen corresponding path program 492 times [2022-02-16 13:57:10,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:10,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641819919] [2022-02-16 13:57:10,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:10,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:10,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:10,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641819919] [2022-02-16 13:57:10,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641819919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:10,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087402627] [2022-02-16 13:57:10,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:57:10,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:10,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:10,296 INFO L229 MonitoredProcess]: Starting monitored process 493 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:10,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-02-16 13:57:10,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:57:10,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:10,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:10,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:57:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:11,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:11,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:11,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:11,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087402627] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:11,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:11,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:11,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123575824] [2022-02-16 13:57:11,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:11,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:11,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:11,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:11,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:11,354 INFO L87 Difference]: Start difference. First operand 243 states and 643 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:11,772 INFO L93 Difference]: Finished difference Result 415 states and 935 transitions. [2022-02-16 13:57:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:57:11,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:11,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:11,773 INFO L225 Difference]: With dead ends: 415 [2022-02-16 13:57:11,773 INFO L226 Difference]: Without dead ends: 415 [2022-02-16 13:57:11,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:57:11,773 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 144 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:11,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 155 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-02-16 13:57:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 241. [2022-02-16 13:57:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6416666666666666) internal successors, (634), 240 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 634 transitions. [2022-02-16 13:57:11,777 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 634 transitions. Word has length 20 [2022-02-16 13:57:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:11,777 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 634 transitions. [2022-02-16 13:57:11,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 634 transitions. [2022-02-16 13:57:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:11,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:11,778 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:11,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Ended with exit code 0 [2022-02-16 13:57:11,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,493 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:11,991 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:11,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2125868482, now seen corresponding path program 493 times [2022-02-16 13:57:11,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:11,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666159622] [2022-02-16 13:57:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:11,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:12,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:12,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666159622] [2022-02-16 13:57:12,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666159622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:12,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594323116] [2022-02-16 13:57:12,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:57:12,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:12,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:12,079 INFO L229 MonitoredProcess]: Starting monitored process 494 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:12,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-02-16 13:57:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:12,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:12,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:57:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:12,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:12,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:12,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:12,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594323116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:12,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:12,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:12,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264193327] [2022-02-16 13:57:12,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:12,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:12,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:12,967 INFO L87 Difference]: Start difference. First operand 241 states and 634 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:13,330 INFO L93 Difference]: Finished difference Result 404 states and 920 transitions. [2022-02-16 13:57:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:13,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:13,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:13,331 INFO L225 Difference]: With dead ends: 404 [2022-02-16 13:57:13,331 INFO L226 Difference]: Without dead ends: 402 [2022-02-16 13:57:13,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:57:13,331 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:13,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 146 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-02-16 13:57:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 244. [2022-02-16 13:57:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6378600823045266) internal successors, (641), 243 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 641 transitions. [2022-02-16 13:57:13,335 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 641 transitions. Word has length 20 [2022-02-16 13:57:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:13,335 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 641 transitions. [2022-02-16 13:57:13,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 641 transitions. [2022-02-16 13:57:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:13,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:13,335 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:13,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Ended with exit code 0 [2022-02-16 13:57:13,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,494 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:13,543 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:13,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1010770686, now seen corresponding path program 494 times [2022-02-16 13:57:13,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:13,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886811895] [2022-02-16 13:57:13,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:13,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:13,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:13,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886811895] [2022-02-16 13:57:13,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886811895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:13,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622832052] [2022-02-16 13:57:13,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:57:13,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:13,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:13,639 INFO L229 MonitoredProcess]: Starting monitored process 495 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:13,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-02-16 13:57:13,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:13,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:14,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:57:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:14,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:14,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:14,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:14,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622832052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:14,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:14,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:14,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227861372] [2022-02-16 13:57:14,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:14,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:14,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:14,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:14,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:14,417 INFO L87 Difference]: Start difference. First operand 244 states and 641 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:14,767 INFO L93 Difference]: Finished difference Result 406 states and 926 transitions. [2022-02-16 13:57:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:57:14,767 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:14,768 INFO L225 Difference]: With dead ends: 406 [2022-02-16 13:57:14,768 INFO L226 Difference]: Without dead ends: 406 [2022-02-16 13:57:14,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:57:14,768 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 143 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:14,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 161 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-02-16 13:57:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 242. [2022-02-16 13:57:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6307053941908713) internal successors, (634), 241 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 634 transitions. [2022-02-16 13:57:14,771 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 634 transitions. Word has length 20 [2022-02-16 13:57:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:14,771 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 634 transitions. [2022-02-16 13:57:14,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 634 transitions. [2022-02-16 13:57:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:14,771 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:14,771 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:14,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:14,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2022-02-16 13:57:14,989 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1440872340, now seen corresponding path program 495 times [2022-02-16 13:57:14,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:14,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292587079] [2022-02-16 13:57:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:14,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:15,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:15,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292587079] [2022-02-16 13:57:15,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292587079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:15,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191954948] [2022-02-16 13:57:15,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:57:15,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:15,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:15,105 INFO L229 MonitoredProcess]: Starting monitored process 496 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:15,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-02-16 13:57:15,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:57:15,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:15,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:15,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:15,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:57:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:15,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:15,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:15,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:16,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191954948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:16,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:16,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:16,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883672016] [2022-02-16 13:57:16,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:16,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:16,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:16,009 INFO L87 Difference]: Start difference. First operand 242 states and 634 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:16,228 INFO L93 Difference]: Finished difference Result 374 states and 880 transitions. [2022-02-16 13:57:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:16,228 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:16,229 INFO L225 Difference]: With dead ends: 374 [2022-02-16 13:57:16,229 INFO L226 Difference]: Without dead ends: 374 [2022-02-16 13:57:16,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:57:16,229 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:16,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 97 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-16 13:57:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 243. [2022-02-16 13:57:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6363636363636362) internal successors, (638), 242 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 638 transitions. [2022-02-16 13:57:16,232 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 638 transitions. Word has length 20 [2022-02-16 13:57:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:16,232 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 638 transitions. [2022-02-16 13:57:16,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 638 transitions. [2022-02-16 13:57:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:16,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:16,233 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:16,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Ended with exit code 0 [2022-02-16 13:57:16,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2022-02-16 13:57:16,439 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash -751150416, now seen corresponding path program 496 times [2022-02-16 13:57:16,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:16,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476579582] [2022-02-16 13:57:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:16,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:16,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:16,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476579582] [2022-02-16 13:57:16,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476579582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:16,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222266252] [2022-02-16 13:57:16,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:57:16,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:16,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:16,552 INFO L229 MonitoredProcess]: Starting monitored process 497 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:16,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-02-16 13:57:16,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:57:16,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:16,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:16,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:17,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-02-16 13:57:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:17,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:17,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:17,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:17,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222266252] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:17,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:17,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:17,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629960022] [2022-02-16 13:57:17,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:17,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:17,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:17,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:17,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:17,494 INFO L87 Difference]: Start difference. First operand 243 states and 638 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:17,772 INFO L93 Difference]: Finished difference Result 381 states and 886 transitions. [2022-02-16 13:57:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:17,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:17,772 INFO L225 Difference]: With dead ends: 381 [2022-02-16 13:57:17,772 INFO L226 Difference]: Without dead ends: 381 [2022-02-16 13:57:17,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:57:17,773 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:17,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 130 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-02-16 13:57:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 239. [2022-02-16 13:57:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6218487394957983) internal successors, (624), 238 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 624 transitions. [2022-02-16 13:57:17,776 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 624 transitions. Word has length 20 [2022-02-16 13:57:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:17,776 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 624 transitions. [2022-02-16 13:57:17,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 624 transitions. [2022-02-16 13:57:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:17,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:17,776 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:17,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:17,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2022-02-16 13:57:17,991 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1046577598, now seen corresponding path program 497 times [2022-02-16 13:57:17,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:17,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451309965] [2022-02-16 13:57:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:17,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:18,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:18,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451309965] [2022-02-16 13:57:18,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451309965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:18,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294827348] [2022-02-16 13:57:18,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:57:18,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:18,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:18,109 INFO L229 MonitoredProcess]: Starting monitored process 498 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:18,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-02-16 13:57:18,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:18,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:18,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:18,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:18,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:18,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:18,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:18,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294827348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:18,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:18,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:18,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928587527] [2022-02-16 13:57:18,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:18,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:18,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:18,936 INFO L87 Difference]: Start difference. First operand 239 states and 624 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:19,146 INFO L93 Difference]: Finished difference Result 342 states and 822 transitions. [2022-02-16 13:57:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:19,147 INFO L225 Difference]: With dead ends: 342 [2022-02-16 13:57:19,147 INFO L226 Difference]: Without dead ends: 342 [2022-02-16 13:57:19,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:57:19,147 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:19,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 76 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-02-16 13:57:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 237. [2022-02-16 13:57:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.614406779661017) internal successors, (617), 236 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 617 transitions. [2022-02-16 13:57:19,150 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 617 transitions. Word has length 20 [2022-02-16 13:57:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:19,150 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 617 transitions. [2022-02-16 13:57:19,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 617 transitions. [2022-02-16 13:57:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:19,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:19,150 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:19,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Ended with exit code 0 [2022-02-16 13:57:19,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498,498 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:19,367 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:19,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1210786994, now seen corresponding path program 498 times [2022-02-16 13:57:19,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:19,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399874762] [2022-02-16 13:57:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:19,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:19,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:19,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399874762] [2022-02-16 13:57:19,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399874762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:19,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088087467] [2022-02-16 13:57:19,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:57:19,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:19,454 INFO L229 MonitoredProcess]: Starting monitored process 499 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:19,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-02-16 13:57:19,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:57:19,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:19,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:20,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:20,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:20,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:20,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:20,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088087467] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:20,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:20,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:20,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948418355] [2022-02-16 13:57:20,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:20,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:20,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:20,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:20,261 INFO L87 Difference]: Start difference. First operand 237 states and 617 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:20,483 INFO L93 Difference]: Finished difference Result 361 states and 848 transitions. [2022-02-16 13:57:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:20,483 INFO L225 Difference]: With dead ends: 361 [2022-02-16 13:57:20,483 INFO L226 Difference]: Without dead ends: 359 [2022-02-16 13:57:20,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:57:20,484 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:20,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 93 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-16 13:57:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 242. [2022-02-16 13:57:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6099585062240664) internal successors, (629), 241 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 629 transitions. [2022-02-16 13:57:20,487 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 629 transitions. Word has length 20 [2022-02-16 13:57:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:20,487 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 629 transitions. [2022-02-16 13:57:20,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 629 transitions. [2022-02-16 13:57:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:20,487 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:20,487 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:20,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Ended with exit code 0 [2022-02-16 13:57:20,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2022-02-16 13:57:20,699 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:20,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:20,699 INFO L85 PathProgramCache]: Analyzing trace with hash -95689198, now seen corresponding path program 499 times [2022-02-16 13:57:20,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:20,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406189699] [2022-02-16 13:57:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:20,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:20,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:20,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406189699] [2022-02-16 13:57:20,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406189699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:20,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628805881] [2022-02-16 13:57:20,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:57:20,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:20,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:20,793 INFO L229 MonitoredProcess]: Starting monitored process 500 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:20,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-02-16 13:57:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:21,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:21,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:21,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:21,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:21,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:21,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:21,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628805881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:21,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:21,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:21,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422103326] [2022-02-16 13:57:21,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:21,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:21,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:21,465 INFO L87 Difference]: Start difference. First operand 242 states and 629 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:21,758 INFO L93 Difference]: Finished difference Result 363 states and 854 transitions. [2022-02-16 13:57:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:57:21,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:21,759 INFO L225 Difference]: With dead ends: 363 [2022-02-16 13:57:21,759 INFO L226 Difference]: Without dead ends: 363 [2022-02-16 13:57:21,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:57:21,759 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:21,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 123 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-02-16 13:57:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 241. [2022-02-16 13:57:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6125) internal successors, (627), 240 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 627 transitions. [2022-02-16 13:57:21,762 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 627 transitions. Word has length 20 [2022-02-16 13:57:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:21,762 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 627 transitions. [2022-02-16 13:57:21,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 627 transitions. [2022-02-16 13:57:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:21,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:21,763 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:21,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Ended with exit code 0 [2022-02-16 13:57:21,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,500 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:21,969 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:21,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1387445740, now seen corresponding path program 500 times [2022-02-16 13:57:21,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:21,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520447614] [2022-02-16 13:57:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:21,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:22,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:22,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520447614] [2022-02-16 13:57:22,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520447614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:22,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830788215] [2022-02-16 13:57:22,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:57:22,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:22,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:22,088 INFO L229 MonitoredProcess]: Starting monitored process 501 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:22,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-02-16 13:57:22,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:22,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:22,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:22,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:22,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:22,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:22,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:22,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830788215] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:22,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:22,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:22,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551573678] [2022-02-16 13:57:22,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:22,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:22,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:22,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:22,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:22,899 INFO L87 Difference]: Start difference. First operand 241 states and 627 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:23,198 INFO L93 Difference]: Finished difference Result 348 states and 835 transitions. [2022-02-16 13:57:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:23,198 INFO L225 Difference]: With dead ends: 348 [2022-02-16 13:57:23,198 INFO L226 Difference]: Without dead ends: 348 [2022-02-16 13:57:23,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:57:23,199 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:23,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 115 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:23,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-16 13:57:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 236. [2022-02-16 13:57:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.608510638297872) internal successors, (613), 235 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 613 transitions. [2022-02-16 13:57:23,201 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 613 transitions. Word has length 20 [2022-02-16 13:57:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:23,202 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 613 transitions. [2022-02-16 13:57:23,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 613 transitions. [2022-02-16 13:57:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:23,202 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:23,202 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:23,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Ended with exit code 0 [2022-02-16 13:57:23,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2022-02-16 13:57:23,411 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1212401214, now seen corresponding path program 501 times [2022-02-16 13:57:23,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:23,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709838246] [2022-02-16 13:57:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:23,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:23,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:23,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709838246] [2022-02-16 13:57:23,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709838246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:23,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270632415] [2022-02-16 13:57:23,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:57:23,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:23,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:23,492 INFO L229 MonitoredProcess]: Starting monitored process 502 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:23,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-02-16 13:57:23,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:57:23,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:24,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:24,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:24,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:24,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:24,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270632415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:24,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:24,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:57:24,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448099784] [2022-02-16 13:57:24,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:24,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:57:24,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:57:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:57:24,287 INFO L87 Difference]: Start difference. First operand 236 states and 613 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:24,474 INFO L93 Difference]: Finished difference Result 334 states and 800 transitions. [2022-02-16 13:57:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:24,475 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:57:24,475 INFO L226 Difference]: Without dead ends: 331 [2022-02-16 13:57:24,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:57:24,475 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:24,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 85 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-16 13:57:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 238. [2022-02-16 13:57:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6033755274261603) internal successors, (617), 237 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 617 transitions. [2022-02-16 13:57:24,478 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 617 transitions. Word has length 20 [2022-02-16 13:57:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:24,478 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 617 transitions. [2022-02-16 13:57:24,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 617 transitions. [2022-02-16 13:57:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:24,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:24,478 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:24,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:24,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2022-02-16 13:57:24,696 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1004107906, now seen corresponding path program 502 times [2022-02-16 13:57:24,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:24,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055892368] [2022-02-16 13:57:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:24,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:24,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:24,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055892368] [2022-02-16 13:57:24,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055892368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:24,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170500296] [2022-02-16 13:57:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:57:24,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:24,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:24,772 INFO L229 MonitoredProcess]: Starting monitored process 503 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:24,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-02-16 13:57:25,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:57:25,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:25,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:25,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:25,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:57:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:25,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:25,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:25,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:25,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170500296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:25,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:25,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:57:25,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525087354] [2022-02-16 13:57:25,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:25,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:57:25,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:57:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:57:25,506 INFO L87 Difference]: Start difference. First operand 238 states and 617 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:25,765 INFO L93 Difference]: Finished difference Result 347 states and 817 transitions. [2022-02-16 13:57:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:25,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:25,766 INFO L225 Difference]: With dead ends: 347 [2022-02-16 13:57:25,766 INFO L226 Difference]: Without dead ends: 345 [2022-02-16 13:57:25,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:57:25,766 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:25,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 121 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:25,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-16 13:57:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 241. [2022-02-16 13:57:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6) internal successors, (624), 240 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 624 transitions. [2022-02-16 13:57:25,769 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 624 transitions. Word has length 20 [2022-02-16 13:57:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:25,769 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 624 transitions. [2022-02-16 13:57:25,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 624 transitions. [2022-02-16 13:57:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:25,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:25,769 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:25,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:25,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,503 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:25,987 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash 110989890, now seen corresponding path program 503 times [2022-02-16 13:57:25,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:25,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708080037] [2022-02-16 13:57:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:25,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:26,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:26,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708080037] [2022-02-16 13:57:26,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708080037] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:26,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521836373] [2022-02-16 13:57:26,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:57:26,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:26,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:26,067 INFO L229 MonitoredProcess]: Starting monitored process 504 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:26,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-02-16 13:57:26,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:57:26,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:26,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:26,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:26,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:57:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:26,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:26,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:26,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:26,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521836373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:26,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:26,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:26,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944429374] [2022-02-16 13:57:26,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:26,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:26,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:26,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:26,887 INFO L87 Difference]: Start difference. First operand 241 states and 624 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:27,132 INFO L93 Difference]: Finished difference Result 334 states and 803 transitions. [2022-02-16 13:57:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:27,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:27,133 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:57:27,133 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 13:57:27,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:57:27,133 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:27,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 100 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 13:57:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 237. [2022-02-16 13:57:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6059322033898304) internal successors, (615), 236 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 615 transitions. [2022-02-16 13:57:27,137 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 615 transitions. Word has length 20 [2022-02-16 13:57:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:27,137 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 615 transitions. [2022-02-16 13:57:27,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 615 transitions. [2022-02-16 13:57:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:27,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:27,137 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:27,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Ended with exit code 0 [2022-02-16 13:57:27,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,504 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:27,344 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 504 times [2022-02-16 13:57:27,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:27,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908942465] [2022-02-16 13:57:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:27,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:27,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:27,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908942465] [2022-02-16 13:57:27,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908942465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:27,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609318839] [2022-02-16 13:57:27,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:57:27,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:27,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:27,425 INFO L229 MonitoredProcess]: Starting monitored process 505 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:27,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Waiting until timeout for monitored process [2022-02-16 13:57:27,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:57:27,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:27,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:27,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:27,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:28,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:28,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:28,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609318839] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:28,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:28,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:57:28,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862611339] [2022-02-16 13:57:28,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:28,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:57:28,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:57:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:57:28,124 INFO L87 Difference]: Start difference. First operand 237 states and 615 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:28,322 INFO L93 Difference]: Finished difference Result 349 states and 821 transitions. [2022-02-16 13:57:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:28,322 INFO L225 Difference]: With dead ends: 349 [2022-02-16 13:57:28,322 INFO L226 Difference]: Without dead ends: 347 [2022-02-16 13:57:28,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:57:28,323 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:28,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 99 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-16 13:57:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 242. [2022-02-16 13:57:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.6016597510373445) internal successors, (627), 241 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 627 transitions. [2022-02-16 13:57:28,326 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 627 transitions. Word has length 20 [2022-02-16 13:57:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:28,326 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 627 transitions. [2022-02-16 13:57:28,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 627 transitions. [2022-02-16 13:57:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:28,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:28,326 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:28,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Ended with exit code 0 [2022-02-16 13:57:28,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,505 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:28,531 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1156467288, now seen corresponding path program 505 times [2022-02-16 13:57:28,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:28,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745970260] [2022-02-16 13:57:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:28,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:28,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:28,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745970260] [2022-02-16 13:57:28,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745970260] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:28,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44060218] [2022-02-16 13:57:28,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:57:28,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:28,635 INFO L229 MonitoredProcess]: Starting monitored process 506 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:28,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Waiting until timeout for monitored process [2022-02-16 13:57:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:28,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:29,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:29,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:29,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:29,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:29,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44060218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:29,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:29,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:29,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417030147] [2022-02-16 13:57:29,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:29,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:29,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:29,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:29,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:29,250 INFO L87 Difference]: Start difference. First operand 242 states and 627 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:29,452 INFO L93 Difference]: Finished difference Result 349 states and 823 transitions. [2022-02-16 13:57:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:57:29,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:29,453 INFO L225 Difference]: With dead ends: 349 [2022-02-16 13:57:29,453 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:57:29,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:57:29,454 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:29,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 98 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:57:29,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 241. [2022-02-16 13:57:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6041666666666665) internal successors, (625), 240 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 625 transitions. [2022-02-16 13:57:29,457 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 625 transitions. Word has length 20 [2022-02-16 13:57:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:29,457 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 625 transitions. [2022-02-16 13:57:29,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 625 transitions. [2022-02-16 13:57:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:29,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:29,457 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:29,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Ended with exit code 0 [2022-02-16 13:57:29,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,506 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:29,671 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:29,671 INFO L85 PathProgramCache]: Analyzing trace with hash 326667650, now seen corresponding path program 506 times [2022-02-16 13:57:29,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:29,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083132265] [2022-02-16 13:57:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:29,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:29,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:29,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083132265] [2022-02-16 13:57:29,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083132265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:29,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528470156] [2022-02-16 13:57:29,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:57:29,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:29,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:29,763 INFO L229 MonitoredProcess]: Starting monitored process 507 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:29,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Waiting until timeout for monitored process [2022-02-16 13:57:30,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:30,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:30,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:30,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:30,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:30,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528470156] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:30,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:30,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:57:30,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587603197] [2022-02-16 13:57:30,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:30,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:57:30,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:57:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:57:30,391 INFO L87 Difference]: Start difference. First operand 241 states and 625 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:30,646 INFO L93 Difference]: Finished difference Result 337 states and 809 transitions. [2022-02-16 13:57:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:30,646 INFO L225 Difference]: With dead ends: 337 [2022-02-16 13:57:30,646 INFO L226 Difference]: Without dead ends: 337 [2022-02-16 13:57:30,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:57:30,647 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:30,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 104 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-02-16 13:57:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 235. [2022-02-16 13:57:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6025641025641026) internal successors, (609), 234 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 609 transitions. [2022-02-16 13:57:30,649 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 609 transitions. Word has length 20 [2022-02-16 13:57:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:30,650 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 609 transitions. [2022-02-16 13:57:30,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 609 transitions. [2022-02-16 13:57:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:30,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:30,650 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:30,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Ended with exit code 0 [2022-02-16 13:57:30,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2022-02-16 13:57:30,850 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2042061134, now seen corresponding path program 507 times [2022-02-16 13:57:30,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:30,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247750087] [2022-02-16 13:57:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:30,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:30,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:30,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247750087] [2022-02-16 13:57:30,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247750087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:30,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481884006] [2022-02-16 13:57:30,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:57:30,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:30,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:30,927 INFO L229 MonitoredProcess]: Starting monitored process 508 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:30,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Waiting until timeout for monitored process [2022-02-16 13:57:31,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:57:31,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:31,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:31,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:31,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:31,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:31,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:31,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:31,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481884006] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:31,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:31,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:57:31,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301537986] [2022-02-16 13:57:31,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:31,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:57:31,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:31,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:57:31,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:57:31,594 INFO L87 Difference]: Start difference. First operand 235 states and 609 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:31,860 INFO L93 Difference]: Finished difference Result 377 states and 869 transitions. [2022-02-16 13:57:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:31,860 INFO L225 Difference]: With dead ends: 377 [2022-02-16 13:57:31,861 INFO L226 Difference]: Without dead ends: 373 [2022-02-16 13:57:31,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:31,861 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:31,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 75 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:31,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-02-16 13:57:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 237. [2022-02-16 13:57:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.597457627118644) internal successors, (613), 236 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 613 transitions. [2022-02-16 13:57:31,864 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 613 transitions. Word has length 20 [2022-02-16 13:57:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:31,864 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 613 transitions. [2022-02-16 13:57:31,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 613 transitions. [2022-02-16 13:57:31,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:31,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:31,864 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:31,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Ended with exit code 0 [2022-02-16 13:57:32,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,508 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:32,071 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1594329262, now seen corresponding path program 508 times [2022-02-16 13:57:32,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:32,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821815444] [2022-02-16 13:57:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:32,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:32,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:32,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821815444] [2022-02-16 13:57:32,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821815444] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:32,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682773516] [2022-02-16 13:57:32,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:57:32,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:32,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:32,155 INFO L229 MonitoredProcess]: Starting monitored process 509 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:32,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Waiting until timeout for monitored process [2022-02-16 13:57:32,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:57:32,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:32,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:32,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:32,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:32,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:32,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:32,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:32,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682773516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:32,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:32,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:57:32,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328941437] [2022-02-16 13:57:32,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:32,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:57:32,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:32,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:57:32,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:57:32,887 INFO L87 Difference]: Start difference. First operand 237 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:33,090 INFO L93 Difference]: Finished difference Result 377 states and 870 transitions. [2022-02-16 13:57:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:33,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:33,091 INFO L225 Difference]: With dead ends: 377 [2022-02-16 13:57:33,091 INFO L226 Difference]: Without dead ends: 374 [2022-02-16 13:57:33,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:57:33,091 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:33,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 83 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-16 13:57:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 238. [2022-02-16 13:57:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5949367088607596) internal successors, (615), 237 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 615 transitions. [2022-02-16 13:57:33,096 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 615 transitions. Word has length 20 [2022-02-16 13:57:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:33,096 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 615 transitions. [2022-02-16 13:57:33,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 615 transitions. [2022-02-16 13:57:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:33,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:33,097 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:33,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Ended with exit code 0 [2022-02-16 13:57:33,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,509 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:33,315 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:33,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1386035954, now seen corresponding path program 509 times [2022-02-16 13:57:33,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:33,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566170679] [2022-02-16 13:57:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:33,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:33,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:33,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566170679] [2022-02-16 13:57:33,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566170679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:33,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478465957] [2022-02-16 13:57:33,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:57:33,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:33,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:33,390 INFO L229 MonitoredProcess]: Starting monitored process 510 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:33,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Waiting until timeout for monitored process [2022-02-16 13:57:33,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:33,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:33,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:33,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:33,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:57:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:33,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:33,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:33,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:34,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478465957] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:34,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:34,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:57:34,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845395172] [2022-02-16 13:57:34,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:34,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:57:34,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:34,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:57:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:57:34,039 INFO L87 Difference]: Start difference. First operand 238 states and 615 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:34,291 INFO L93 Difference]: Finished difference Result 390 states and 887 transitions. [2022-02-16 13:57:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:34,292 INFO L225 Difference]: With dead ends: 390 [2022-02-16 13:57:34,292 INFO L226 Difference]: Without dead ends: 388 [2022-02-16 13:57:34,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:57:34,292 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 152 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:34,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 101 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-16 13:57:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 241. [2022-02-16 13:57:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.591666666666667) internal successors, (622), 240 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 622 transitions. [2022-02-16 13:57:34,295 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 622 transitions. Word has length 20 [2022-02-16 13:57:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:34,295 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 622 transitions. [2022-02-16 13:57:34,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 622 transitions. [2022-02-16 13:57:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:34,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:34,296 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:34,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:34,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2022-02-16 13:57:34,499 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:34,500 INFO L85 PathProgramCache]: Analyzing trace with hash -270938158, now seen corresponding path program 510 times [2022-02-16 13:57:34,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:34,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613505562] [2022-02-16 13:57:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:34,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:34,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:34,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613505562] [2022-02-16 13:57:34,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613505562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:34,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120397758] [2022-02-16 13:57:34,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:57:34,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:34,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:34,597 INFO L229 MonitoredProcess]: Starting monitored process 511 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:34,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Waiting until timeout for monitored process [2022-02-16 13:57:34,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:57:34,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:34,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:34,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:35,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:57:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:35,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:35,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:35,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120397758] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:35,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:35,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:57:35,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279841777] [2022-02-16 13:57:35,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:35,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:57:35,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:57:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:57:35,372 INFO L87 Difference]: Start difference. First operand 241 states and 622 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:35,607 INFO L93 Difference]: Finished difference Result 377 states and 873 transitions. [2022-02-16 13:57:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:35,608 INFO L225 Difference]: With dead ends: 377 [2022-02-16 13:57:35,608 INFO L226 Difference]: Without dead ends: 377 [2022-02-16 13:57:35,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:57:35,608 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:35,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 70 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-02-16 13:57:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 236. [2022-02-16 13:57:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6) internal successors, (611), 235 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 611 transitions. [2022-02-16 13:57:35,611 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 611 transitions. Word has length 20 [2022-02-16 13:57:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:35,611 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 611 transitions. [2022-02-16 13:57:35,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 611 transitions. [2022-02-16 13:57:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:35,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:35,612 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:35,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:35,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2022-02-16 13:57:35,827 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2018640498, now seen corresponding path program 511 times [2022-02-16 13:57:35,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:35,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457958199] [2022-02-16 13:57:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:35,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:35,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:35,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457958199] [2022-02-16 13:57:35,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457958199] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:35,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562108627] [2022-02-16 13:57:35,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:57:35,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:35,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:35,907 INFO L229 MonitoredProcess]: Starting monitored process 512 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:35,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Waiting until timeout for monitored process [2022-02-16 13:57:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:36,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:36,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:36,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:36,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:36,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562108627] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:36,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:36,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:57:36,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237191761] [2022-02-16 13:57:36,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:36,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:57:36,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:57:36,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:57:36,690 INFO L87 Difference]: Start difference. First operand 236 states and 611 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:36,908 INFO L93 Difference]: Finished difference Result 346 states and 821 transitions. [2022-02-16 13:57:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:36,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:36,908 INFO L225 Difference]: With dead ends: 346 [2022-02-16 13:57:36,909 INFO L226 Difference]: Without dead ends: 343 [2022-02-16 13:57:36,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:36,909 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:36,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 83 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-16 13:57:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 238. [2022-02-16 13:57:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5949367088607596) internal successors, (615), 237 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 615 transitions. [2022-02-16 13:57:36,912 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 615 transitions. Word has length 20 [2022-02-16 13:57:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:36,912 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 615 transitions. [2022-02-16 13:57:36,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 615 transitions. [2022-02-16 13:57:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:36,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:36,912 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:36,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:37,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2022-02-16 13:57:37,113 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1810347190, now seen corresponding path program 512 times [2022-02-16 13:57:37,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:37,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595765003] [2022-02-16 13:57:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:37,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:37,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:37,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595765003] [2022-02-16 13:57:37,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595765003] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:37,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371056620] [2022-02-16 13:57:37,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:57:37,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:37,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:37,204 INFO L229 MonitoredProcess]: Starting monitored process 513 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:37,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Waiting until timeout for monitored process [2022-02-16 13:57:37,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:37,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:37,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:37,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:37,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:57:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:37,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:37,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:37,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:38,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371056620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:38,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:38,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:57:38,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963265815] [2022-02-16 13:57:38,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:38,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:57:38,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:57:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:57:38,019 INFO L87 Difference]: Start difference. First operand 238 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:38,270 INFO L93 Difference]: Finished difference Result 359 states and 838 transitions. [2022-02-16 13:57:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:38,270 INFO L225 Difference]: With dead ends: 359 [2022-02-16 13:57:38,270 INFO L226 Difference]: Without dead ends: 357 [2022-02-16 13:57:38,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:57:38,271 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:38,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 98 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-02-16 13:57:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 241. [2022-02-16 13:57:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.591666666666667) internal successors, (622), 240 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 622 transitions. [2022-02-16 13:57:38,273 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 622 transitions. Word has length 20 [2022-02-16 13:57:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:38,274 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 622 transitions. [2022-02-16 13:57:38,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 622 transitions. [2022-02-16 13:57:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:38,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:38,274 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:38,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Ended with exit code 0 [2022-02-16 13:57:38,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,513 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:38,475 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash -695249394, now seen corresponding path program 513 times [2022-02-16 13:57:38,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:38,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587499716] [2022-02-16 13:57:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:38,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:38,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:38,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587499716] [2022-02-16 13:57:38,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587499716] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:38,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579516967] [2022-02-16 13:57:38,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:57:38,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:38,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:38,554 INFO L229 MonitoredProcess]: Starting monitored process 514 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:38,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Waiting until timeout for monitored process [2022-02-16 13:57:38,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:57:38,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:38,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:38,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:57:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:39,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:39,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:39,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:39,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579516967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:39,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:39,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:57:39,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973488666] [2022-02-16 13:57:39,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:39,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:57:39,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:39,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:57:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:57:39,265 INFO L87 Difference]: Start difference. First operand 241 states and 622 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:39,438 INFO L93 Difference]: Finished difference Result 346 states and 824 transitions. [2022-02-16 13:57:39,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:39,438 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:39,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:39,439 INFO L225 Difference]: With dead ends: 346 [2022-02-16 13:57:39,439 INFO L226 Difference]: Without dead ends: 346 [2022-02-16 13:57:39,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:57:39,439 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:39,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 71 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-16 13:57:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 237. [2022-02-16 13:57:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.597457627118644) internal successors, (613), 236 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 613 transitions. [2022-02-16 13:57:39,442 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 613 transitions. Word has length 20 [2022-02-16 13:57:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:39,442 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 613 transitions. [2022-02-16 13:57:39,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 613 transitions. [2022-02-16 13:57:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:39,442 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:39,442 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:39,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:39,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 514 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2022-02-16 13:57:39,655 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1217162928, now seen corresponding path program 514 times [2022-02-16 13:57:39,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:39,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293792340] [2022-02-16 13:57:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:39,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:39,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:39,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293792340] [2022-02-16 13:57:39,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293792340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:39,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488256209] [2022-02-16 13:57:39,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:57:39,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:39,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:39,702 INFO L229 MonitoredProcess]: Starting monitored process 515 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:39,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Waiting until timeout for monitored process [2022-02-16 13:57:40,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:57:40,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:40,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:40,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:40,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:40,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:40,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:40,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:40,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488256209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:40,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:40,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:57:40,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621808266] [2022-02-16 13:57:40,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:40,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:57:40,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:40,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:57:40,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:57:40,303 INFO L87 Difference]: Start difference. First operand 237 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:40,461 INFO L93 Difference]: Finished difference Result 361 states and 842 transitions. [2022-02-16 13:57:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:40,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:40,461 INFO L225 Difference]: With dead ends: 361 [2022-02-16 13:57:40,462 INFO L226 Difference]: Without dead ends: 359 [2022-02-16 13:57:40,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:57:40,462 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 115 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:40,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 64 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-16 13:57:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 242. [2022-02-16 13:57:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.5933609958506225) internal successors, (625), 241 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 625 transitions. [2022-02-16 13:57:40,465 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 625 transitions. Word has length 20 [2022-02-16 13:57:40,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:40,465 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 625 transitions. [2022-02-16 13:57:40,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 625 transitions. [2022-02-16 13:57:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:40,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:40,465 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:40,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:40,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,515 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:40,682 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:40,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1962706572, now seen corresponding path program 515 times [2022-02-16 13:57:40,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:40,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444389557] [2022-02-16 13:57:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:40,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:40,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:40,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444389557] [2022-02-16 13:57:40,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444389557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:40,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061678468] [2022-02-16 13:57:40,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:57:40,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:40,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:40,747 INFO L229 MonitoredProcess]: Starting monitored process 516 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:40,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Waiting until timeout for monitored process [2022-02-16 13:57:41,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:57:41,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:41,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:41,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:41,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:41,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:41,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:41,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061678468] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:41,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:41,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:57:41,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409362617] [2022-02-16 13:57:41,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:41,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:57:41,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:41,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:57:41,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:57:41,428 INFO L87 Difference]: Start difference. First operand 242 states and 625 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:41,647 INFO L93 Difference]: Finished difference Result 361 states and 844 transitions. [2022-02-16 13:57:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:57:41,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:41,648 INFO L225 Difference]: With dead ends: 361 [2022-02-16 13:57:41,648 INFO L226 Difference]: Without dead ends: 361 [2022-02-16 13:57:41,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:57:41,648 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:41,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 98 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-02-16 13:57:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 241. [2022-02-16 13:57:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.595833333333333) internal successors, (623), 240 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 623 transitions. [2022-02-16 13:57:41,651 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 623 transitions. Word has length 20 [2022-02-16 13:57:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:41,651 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 623 transitions. [2022-02-16 13:57:41,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 623 transitions. [2022-02-16 13:57:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:41,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:41,652 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:41,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Ended with exit code 0 [2022-02-16 13:57:41,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,516 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:41,869 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:41,870 INFO L85 PathProgramCache]: Analyzing trace with hash -479571634, now seen corresponding path program 516 times [2022-02-16 13:57:41,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:41,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653505739] [2022-02-16 13:57:41,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:41,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:41,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:41,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653505739] [2022-02-16 13:57:41,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653505739] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:41,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825905482] [2022-02-16 13:57:41,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:57:41,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:41,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:41,951 INFO L229 MonitoredProcess]: Starting monitored process 517 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:41,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Waiting until timeout for monitored process [2022-02-16 13:57:42,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:57:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:42,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:42,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:42,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:57:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:42,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825905482] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:42,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:42,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:57:42,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526352112] [2022-02-16 13:57:42,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:42,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:57:42,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:42,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:57:42,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:57:42,648 INFO L87 Difference]: Start difference. First operand 241 states and 623 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:42,815 INFO L93 Difference]: Finished difference Result 349 states and 830 transitions. [2022-02-16 13:57:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:42,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:42,816 INFO L225 Difference]: With dead ends: 349 [2022-02-16 13:57:42,816 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:57:42,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:57:42,816 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:42,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 81 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:57:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 234. [2022-02-16 13:57:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.59656652360515) internal successors, (605), 233 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 605 transitions. [2022-02-16 13:57:42,819 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 605 transitions. Word has length 20 [2022-02-16 13:57:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:42,819 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 605 transitions. [2022-02-16 13:57:42,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 605 transitions. [2022-02-16 13:57:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:42,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:42,820 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:42,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:43,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2022-02-16 13:57:43,036 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:43,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1389776220, now seen corresponding path program 517 times [2022-02-16 13:57:43,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:43,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226233524] [2022-02-16 13:57:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:43,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:43,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:43,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226233524] [2022-02-16 13:57:43,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226233524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:43,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742393962] [2022-02-16 13:57:43,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:57:43,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:43,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:43,123 INFO L229 MonitoredProcess]: Starting monitored process 518 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:43,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Waiting until timeout for monitored process [2022-02-16 13:57:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:43,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:57:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:43,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:43,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:43,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:44,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742393962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:44,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:44,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:44,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322898343] [2022-02-16 13:57:44,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:44,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:44,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:44,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:44,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:44,015 INFO L87 Difference]: Start difference. First operand 234 states and 605 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:44,318 INFO L93 Difference]: Finished difference Result 334 states and 789 transitions. [2022-02-16 13:57:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:44,318 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:44,319 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:57:44,319 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 13:57:44,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:57:44,319 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:44,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 111 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 13:57:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 238. [2022-02-16 13:57:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6033755274261603) internal successors, (617), 237 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 617 transitions. [2022-02-16 13:57:44,322 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 617 transitions. Word has length 20 [2022-02-16 13:57:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:44,322 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 617 transitions. [2022-02-16 13:57:44,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 617 transitions. [2022-02-16 13:57:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:44,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:44,323 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:44,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:44,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,518 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:44,526 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:44,526 INFO L85 PathProgramCache]: Analyzing trace with hash -675243364, now seen corresponding path program 518 times [2022-02-16 13:57:44,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:44,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222203496] [2022-02-16 13:57:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:44,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:44,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:44,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222203496] [2022-02-16 13:57:44,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222203496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:44,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699374295] [2022-02-16 13:57:44,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:57:44,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:44,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:44,588 INFO L229 MonitoredProcess]: Starting monitored process 519 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:44,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Waiting until timeout for monitored process [2022-02-16 13:57:44,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:44,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:44,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:44,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:45,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-02-16 13:57:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:45,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:45,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:45,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:45,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699374295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:45,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:45,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:45,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031527577] [2022-02-16 13:57:45,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:45,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:45,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:45,434 INFO L87 Difference]: Start difference. First operand 238 states and 617 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:45,763 INFO L93 Difference]: Finished difference Result 335 states and 789 transitions. [2022-02-16 13:57:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:57:45,764 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:45,764 INFO L225 Difference]: With dead ends: 335 [2022-02-16 13:57:45,764 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 13:57:45,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:57:45,764 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:45,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 100 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 13:57:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 237. [2022-02-16 13:57:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6016949152542375) internal successors, (614), 236 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 614 transitions. [2022-02-16 13:57:45,767 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 614 transitions. Word has length 20 [2022-02-16 13:57:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:45,767 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 614 transitions. [2022-02-16 13:57:45,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 614 transitions. [2022-02-16 13:57:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:45,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:45,768 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:45,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:45,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,519 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:45,975 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:45,975 INFO L85 PathProgramCache]: Analyzing trace with hash -87498042, now seen corresponding path program 519 times [2022-02-16 13:57:45,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:45,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200767858] [2022-02-16 13:57:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:45,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:46,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:46,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200767858] [2022-02-16 13:57:46,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200767858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:46,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557478124] [2022-02-16 13:57:46,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:57:46,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:46,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:46,079 INFO L229 MonitoredProcess]: Starting monitored process 520 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:46,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Waiting until timeout for monitored process [2022-02-16 13:57:46,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:57:46,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:46,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:46,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:46,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:46,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:46,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:46,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:46,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557478124] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:46,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:46,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:57:46,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143633585] [2022-02-16 13:57:46,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:46,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:57:46,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:46,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:57:46,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:57:46,986 INFO L87 Difference]: Start difference. First operand 237 states and 614 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:47,344 INFO L93 Difference]: Finished difference Result 322 states and 772 transitions. [2022-02-16 13:57:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:47,345 INFO L225 Difference]: With dead ends: 322 [2022-02-16 13:57:47,345 INFO L226 Difference]: Without dead ends: 320 [2022-02-16 13:57:47,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:57:47,345 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:47,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 98 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-16 13:57:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 235. [2022-02-16 13:57:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.606837606837607) internal successors, (610), 234 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 610 transitions. [2022-02-16 13:57:47,348 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 610 transitions. Word has length 20 [2022-02-16 13:57:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:47,348 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 610 transitions. [2022-02-16 13:57:47,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 610 transitions. [2022-02-16 13:57:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:47,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:47,348 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:47,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:47,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2022-02-16 13:57:47,549 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash 772349032, now seen corresponding path program 520 times [2022-02-16 13:57:47,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:47,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69565398] [2022-02-16 13:57:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:47,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:47,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:47,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69565398] [2022-02-16 13:57:47,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69565398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:47,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520174324] [2022-02-16 13:57:47,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:57:47,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:47,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:47,666 INFO L229 MonitoredProcess]: Starting monitored process 521 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:47,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Waiting until timeout for monitored process [2022-02-16 13:57:48,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:57:48,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:48,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:48,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:48,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 73 [2022-02-16 13:57:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:48,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:48,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:48,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:48,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520174324] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:48,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:48,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:48,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025551958] [2022-02-16 13:57:48,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:48,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:48,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:48,628 INFO L87 Difference]: Start difference. First operand 235 states and 610 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:48,923 INFO L93 Difference]: Finished difference Result 375 states and 855 transitions. [2022-02-16 13:57:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:48,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:48,924 INFO L225 Difference]: With dead ends: 375 [2022-02-16 13:57:48,924 INFO L226 Difference]: Without dead ends: 375 [2022-02-16 13:57:48,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:57:48,924 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 142 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:48,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 134 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-02-16 13:57:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 241. [2022-02-16 13:57:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.625) internal successors, (630), 240 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 630 transitions. [2022-02-16 13:57:48,927 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 630 transitions. Word has length 20 [2022-02-16 13:57:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:48,927 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 630 transitions. [2022-02-16 13:57:48,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:48,927 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 630 transitions. [2022-02-16 13:57:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:48,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:48,928 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:48,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:49,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2022-02-16 13:57:49,143 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1486881888, now seen corresponding path program 521 times [2022-02-16 13:57:49,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:49,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633994046] [2022-02-16 13:57:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:49,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:49,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:49,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633994046] [2022-02-16 13:57:49,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633994046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:49,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141507128] [2022-02-16 13:57:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:57:49,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:49,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:49,218 INFO L229 MonitoredProcess]: Starting monitored process 522 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:49,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Waiting until timeout for monitored process [2022-02-16 13:57:49,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:49,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:49,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:49,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-02-16 13:57:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:49,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:50,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:50,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:50,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141507128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:50,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:50,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:50,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718586067] [2022-02-16 13:57:50,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:50,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:50,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:50,169 INFO L87 Difference]: Start difference. First operand 241 states and 630 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:50,509 INFO L93 Difference]: Finished difference Result 385 states and 863 transitions. [2022-02-16 13:57:50,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-16 13:57:50,509 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:50,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:50,509 INFO L225 Difference]: With dead ends: 385 [2022-02-16 13:57:50,510 INFO L226 Difference]: Without dead ends: 384 [2022-02-16 13:57:50,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:57:50,510 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 187 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:50,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 108 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-02-16 13:57:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 238. [2022-02-16 13:57:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6244725738396624) internal successors, (622), 237 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 622 transitions. [2022-02-16 13:57:50,513 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 622 transitions. Word has length 20 [2022-02-16 13:57:50,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:50,513 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 622 transitions. [2022-02-16 13:57:50,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 622 transitions. [2022-02-16 13:57:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:50,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:50,513 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:50,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Ended with exit code 0 [2022-02-16 13:57:50,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,522 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:50,722 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash 980642340, now seen corresponding path program 522 times [2022-02-16 13:57:50,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:50,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294437259] [2022-02-16 13:57:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:50,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:50,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:50,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294437259] [2022-02-16 13:57:50,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294437259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:50,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930679583] [2022-02-16 13:57:50,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:57:50,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:50,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:50,829 INFO L229 MonitoredProcess]: Starting monitored process 523 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:50,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Waiting until timeout for monitored process [2022-02-16 13:57:51,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:57:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:51,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:51,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:51,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:57:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:51,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:51,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:51,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:51,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930679583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:51,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:51,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:51,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142520121] [2022-02-16 13:57:51,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:51,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:51,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:51,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:51,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:51,716 INFO L87 Difference]: Start difference. First operand 238 states and 622 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:51,917 INFO L93 Difference]: Finished difference Result 364 states and 840 transitions. [2022-02-16 13:57:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:51,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:51,918 INFO L225 Difference]: With dead ends: 364 [2022-02-16 13:57:51,918 INFO L226 Difference]: Without dead ends: 364 [2022-02-16 13:57:51,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:57:51,918 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 149 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:51,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 102 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-16 13:57:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 238. [2022-02-16 13:57:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.632911392405063) internal successors, (624), 237 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 624 transitions. [2022-02-16 13:57:51,921 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 624 transitions. Word has length 20 [2022-02-16 13:57:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:51,921 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 624 transitions. [2022-02-16 13:57:51,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 624 transitions. [2022-02-16 13:57:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:51,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:51,921 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:51,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:52,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,523 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:52,138 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:52,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1670364264, now seen corresponding path program 523 times [2022-02-16 13:57:52,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:52,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577156941] [2022-02-16 13:57:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:52,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:52,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:52,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577156941] [2022-02-16 13:57:52,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577156941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:52,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229378684] [2022-02-16 13:57:52,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:57:52,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:52,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:52,238 INFO L229 MonitoredProcess]: Starting monitored process 524 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:52,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Waiting until timeout for monitored process [2022-02-16 13:57:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:52,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:52,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:52,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-02-16 13:57:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:53,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:53,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:53,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:53,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229378684] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:53,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:53,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:53,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388114919] [2022-02-16 13:57:53,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:53,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:53,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:53,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:53,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:53,336 INFO L87 Difference]: Start difference. First operand 238 states and 624 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:53,602 INFO L93 Difference]: Finished difference Result 362 states and 837 transitions. [2022-02-16 13:57:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:57:53,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:53,603 INFO L225 Difference]: With dead ends: 362 [2022-02-16 13:57:53,603 INFO L226 Difference]: Without dead ends: 362 [2022-02-16 13:57:53,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:57:53,603 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 118 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:53,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 128 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-16 13:57:53,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 236. [2022-02-16 13:57:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.617021276595745) internal successors, (615), 235 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 615 transitions. [2022-02-16 13:57:53,606 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 615 transitions. Word has length 20 [2022-02-16 13:57:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:53,606 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 615 transitions. [2022-02-16 13:57:53,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 615 transitions. [2022-02-16 13:57:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:53,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:53,607 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:53,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:53,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2022-02-16 13:57:53,824 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:53,824 INFO L85 PathProgramCache]: Analyzing trace with hash -971810980, now seen corresponding path program 524 times [2022-02-16 13:57:53,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:53,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311971753] [2022-02-16 13:57:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:53,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:53,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:53,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311971753] [2022-02-16 13:57:53,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311971753] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:53,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074843278] [2022-02-16 13:57:53,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:57:53,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:53,921 INFO L229 MonitoredProcess]: Starting monitored process 525 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:53,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Waiting until timeout for monitored process [2022-02-16 13:57:54,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:54,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:54,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:54,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 84 [2022-02-16 13:57:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:54,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:54,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:54,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:54,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074843278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:54,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:54,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:54,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799749759] [2022-02-16 13:57:54,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:54,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:54,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:54,955 INFO L87 Difference]: Start difference. First operand 236 states and 615 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:55,299 INFO L93 Difference]: Finished difference Result 366 states and 843 transitions. [2022-02-16 13:57:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:57:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:55,299 INFO L225 Difference]: With dead ends: 366 [2022-02-16 13:57:55,300 INFO L226 Difference]: Without dead ends: 364 [2022-02-16 13:57:55,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:57:55,300 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 112 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:55,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 133 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:57:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-16 13:57:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 239. [2022-02-16 13:57:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6134453781512605) internal successors, (622), 238 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:55,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 622 transitions. [2022-02-16 13:57:55,303 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 622 transitions. Word has length 20 [2022-02-16 13:57:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:55,303 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 622 transitions. [2022-02-16 13:57:55,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 622 transitions. [2022-02-16 13:57:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:55,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:55,303 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:55,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Ended with exit code 0 [2022-02-16 13:57:55,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2022-02-16 13:57:55,519 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash 143286816, now seen corresponding path program 525 times [2022-02-16 13:57:55,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:55,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578504811] [2022-02-16 13:57:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:55,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:55,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:55,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578504811] [2022-02-16 13:57:55,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578504811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:55,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969357381] [2022-02-16 13:57:55,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:57:55,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:55,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:55,607 INFO L229 MonitoredProcess]: Starting monitored process 526 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:55,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Waiting until timeout for monitored process [2022-02-16 13:57:55,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:57:55,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:55,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:55,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:56,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-02-16 13:57:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:56,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:56,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:56,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:56,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969357381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:56,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:56,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:57:56,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202801368] [2022-02-16 13:57:56,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:56,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:57:56,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:57:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:57:56,598 INFO L87 Difference]: Start difference. First operand 239 states and 622 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:56,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:56,903 INFO L93 Difference]: Finished difference Result 355 states and 833 transitions. [2022-02-16 13:57:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:57:56,903 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:56,903 INFO L225 Difference]: With dead ends: 355 [2022-02-16 13:57:56,903 INFO L226 Difference]: Without dead ends: 355 [2022-02-16 13:57:56,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:57:56,904 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:56,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 77 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-02-16 13:57:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 235. [2022-02-16 13:57:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.606837606837607) internal successors, (610), 234 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 610 transitions. [2022-02-16 13:57:56,907 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 610 transitions. Word has length 20 [2022-02-16 13:57:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:56,907 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 610 transitions. [2022-02-16 13:57:56,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 610 transitions. [2022-02-16 13:57:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:56,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:56,907 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:56,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:57,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,526 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:57,125 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1002434378, now seen corresponding path program 526 times [2022-02-16 13:57:57,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:57,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213134786] [2022-02-16 13:57:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:57,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:57,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:57,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213134786] [2022-02-16 13:57:57,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213134786] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:57,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029453284] [2022-02-16 13:57:57,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:57:57,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:57,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:57,241 INFO L229 MonitoredProcess]: Starting monitored process 527 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:57,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Waiting until timeout for monitored process [2022-02-16 13:57:57,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:57:57,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:57,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:57:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:57,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:58,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:58,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:58,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029453284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:58,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:58,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:57:58,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930554517] [2022-02-16 13:57:58,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:58,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:57:58,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:57:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:57:58,268 INFO L87 Difference]: Start difference. First operand 235 states and 610 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:57:58,493 INFO L93 Difference]: Finished difference Result 324 states and 775 transitions. [2022-02-16 13:57:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:57:58,493 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:57:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:57:58,493 INFO L225 Difference]: With dead ends: 324 [2022-02-16 13:57:58,494 INFO L226 Difference]: Without dead ends: 321 [2022-02-16 13:57:58,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:57:58,494 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:57:58,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 73 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:57:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-16 13:57:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 236. [2022-02-16 13:57:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6042553191489364) internal successors, (612), 235 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 612 transitions. [2022-02-16 13:57:58,497 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 612 transitions. Word has length 20 [2022-02-16 13:57:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:57:58,497 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 612 transitions. [2022-02-16 13:57:58,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:57:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 612 transitions. [2022-02-16 13:57:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:57:58,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:57:58,497 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:57:58,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Forceful destruction successful, exit code 0 [2022-02-16 13:57:58,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,527 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:58,706 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:57:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:57:58,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1210727686, now seen corresponding path program 527 times [2022-02-16 13:57:58,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:57:58,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349673656] [2022-02-16 13:57:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:57:58,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:57:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:57:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:58,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:57:58,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349673656] [2022-02-16 13:57:58,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349673656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:57:58,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777858876] [2022-02-16 13:57:58,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:57:58,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:57:58,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:57:58,811 INFO L229 MonitoredProcess]: Starting monitored process 528 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:57:58,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Waiting until timeout for monitored process [2022-02-16 13:57:59,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:57:59,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:57:59,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:57:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:57:59,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:57:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:59,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:57:59,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:57:59,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:57:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:57:59,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777858876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:57:59,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:57:59,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:57:59,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719056334] [2022-02-16 13:57:59,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:57:59,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:57:59,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:57:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:57:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:57:59,816 INFO L87 Difference]: Start difference. First operand 236 states and 612 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:00,162 INFO L93 Difference]: Finished difference Result 337 states and 792 transitions. [2022-02-16 13:58:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:00,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:00,163 INFO L225 Difference]: With dead ends: 337 [2022-02-16 13:58:00,163 INFO L226 Difference]: Without dead ends: 335 [2022-02-16 13:58:00,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:58:00,163 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:00,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 112 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-16 13:58:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 239. [2022-02-16 13:58:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.600840336134454) internal successors, (619), 238 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 619 transitions. [2022-02-16 13:58:00,166 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 619 transitions. Word has length 20 [2022-02-16 13:58:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:00,166 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 619 transitions. [2022-02-16 13:58:00,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 619 transitions. [2022-02-16 13:58:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:00,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:00,167 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:00,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Ended with exit code 0 [2022-02-16 13:58:00,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,528 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:00,384 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1969141814, now seen corresponding path program 528 times [2022-02-16 13:58:00,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:00,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802260536] [2022-02-16 13:58:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:00,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:00,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:00,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802260536] [2022-02-16 13:58:00,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802260536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:00,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702347267] [2022-02-16 13:58:00,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:58:00,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:00,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:00,475 INFO L229 MonitoredProcess]: Starting monitored process 529 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:00,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Waiting until timeout for monitored process [2022-02-16 13:58:00,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:58:00,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:00,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:01,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:58:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:01,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:01,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:01,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:58:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:01,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702347267] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:01,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:01,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:01,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703356392] [2022-02-16 13:58:01,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:01,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:01,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:01,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:01,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:01,357 INFO L87 Difference]: Start difference. First operand 239 states and 619 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:01,573 INFO L93 Difference]: Finished difference Result 324 states and 778 transitions. [2022-02-16 13:58:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:01,574 INFO L225 Difference]: With dead ends: 324 [2022-02-16 13:58:01,574 INFO L226 Difference]: Without dead ends: 324 [2022-02-16 13:58:01,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:58:01,574 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:01,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 97 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-16 13:58:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 234. [2022-02-16 13:58:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.59656652360515) internal successors, (605), 233 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 605 transitions. [2022-02-16 13:58:01,578 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 605 transitions. Word has length 20 [2022-02-16 13:58:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:01,578 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 605 transitions. [2022-02-16 13:58:01,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 605 transitions. [2022-02-16 13:58:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:01,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:01,578 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:01,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:01,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,529 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:01,779 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:01,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:01,779 INFO L85 PathProgramCache]: Analyzing trace with hash 135882178, now seen corresponding path program 529 times [2022-02-16 13:58:01,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:01,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012528682] [2022-02-16 13:58:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:01,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:01,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:01,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012528682] [2022-02-16 13:58:01,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012528682] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:01,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342125644] [2022-02-16 13:58:01,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:58:01,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:01,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:01,919 INFO L229 MonitoredProcess]: Starting monitored process 530 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:01,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Waiting until timeout for monitored process [2022-02-16 13:58:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:02,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:02,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:02,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:02,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:02,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:02,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:03,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342125644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:03,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:03,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:03,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579356576] [2022-02-16 13:58:03,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:03,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:03,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:03,040 INFO L87 Difference]: Start difference. First operand 234 states and 605 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:03,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:03,388 INFO L93 Difference]: Finished difference Result 381 states and 860 transitions. [2022-02-16 13:58:03,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:03,388 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:03,389 INFO L225 Difference]: With dead ends: 381 [2022-02-16 13:58:03,389 INFO L226 Difference]: Without dead ends: 381 [2022-02-16 13:58:03,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:58:03,389 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 211 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:03,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 119 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-02-16 13:58:03,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 241. [2022-02-16 13:58:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.625) internal successors, (630), 240 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 630 transitions. [2022-02-16 13:58:03,392 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 630 transitions. Word has length 20 [2022-02-16 13:58:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:03,392 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 630 transitions. [2022-02-16 13:58:03,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 630 transitions. [2022-02-16 13:58:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:03,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:03,393 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:03,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:03,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 530 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2022-02-16 13:58:03,609 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 850415034, now seen corresponding path program 530 times [2022-02-16 13:58:03,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:03,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932688928] [2022-02-16 13:58:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:03,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:03,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:03,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932688928] [2022-02-16 13:58:03,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932688928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:03,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84519350] [2022-02-16 13:58:03,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:58:03,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:03,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:03,733 INFO L229 MonitoredProcess]: Starting monitored process 531 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:03,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Waiting until timeout for monitored process [2022-02-16 13:58:04,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:58:04,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:04,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:04,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:04,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:04,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:04,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:04,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:04,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84519350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:04,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:04,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:58:04,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039997137] [2022-02-16 13:58:04,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:04,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:58:04,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:04,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:58:04,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:58:04,772 INFO L87 Difference]: Start difference. First operand 241 states and 630 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:05,023 INFO L93 Difference]: Finished difference Result 372 states and 849 transitions. [2022-02-16 13:58:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:58:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:05,023 INFO L225 Difference]: With dead ends: 372 [2022-02-16 13:58:05,024 INFO L226 Difference]: Without dead ends: 371 [2022-02-16 13:58:05,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:58:05,024 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 148 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:05,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 115 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-16 13:58:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 238. [2022-02-16 13:58:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6244725738396624) internal successors, (622), 237 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 622 transitions. [2022-02-16 13:58:05,027 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 622 transitions. Word has length 20 [2022-02-16 13:58:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:05,027 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 622 transitions. [2022-02-16 13:58:05,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 622 transitions. [2022-02-16 13:58:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:05,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:05,027 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:05,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Ended with exit code 0 [2022-02-16 13:58:05,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2022-02-16 13:58:05,236 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:05,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:05,236 INFO L85 PathProgramCache]: Analyzing trace with hash 344175486, now seen corresponding path program 531 times [2022-02-16 13:58:05,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:05,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006540767] [2022-02-16 13:58:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:05,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:05,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:05,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006540767] [2022-02-16 13:58:05,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006540767] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:05,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677919629] [2022-02-16 13:58:05,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:58:05,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:05,356 INFO L229 MonitoredProcess]: Starting monitored process 532 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:05,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Waiting until timeout for monitored process [2022-02-16 13:58:05,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:58:05,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:05,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:05,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:06,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:06,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:06,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:06,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677919629] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:06,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:06,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:06,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476253435] [2022-02-16 13:58:06,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:06,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:06,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:06,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:06,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:06,374 INFO L87 Difference]: Start difference. First operand 238 states and 622 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:06,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:06,752 INFO L93 Difference]: Finished difference Result 389 states and 884 transitions. [2022-02-16 13:58:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:06,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:06,753 INFO L225 Difference]: With dead ends: 389 [2022-02-16 13:58:06,753 INFO L226 Difference]: Without dead ends: 389 [2022-02-16 13:58:06,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:58:06,753 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:06,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 156 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-02-16 13:58:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 240. [2022-02-16 13:58:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6401673640167362) internal successors, (631), 239 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 631 transitions. [2022-02-16 13:58:06,756 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 631 transitions. Word has length 20 [2022-02-16 13:58:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:06,756 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 631 transitions. [2022-02-16 13:58:06,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 631 transitions. [2022-02-16 13:58:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:06,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:06,756 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:06,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:06,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2022-02-16 13:58:06,973 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1033897410, now seen corresponding path program 532 times [2022-02-16 13:58:06,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:06,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469329288] [2022-02-16 13:58:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:06,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:07,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:07,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469329288] [2022-02-16 13:58:07,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469329288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:07,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039404360] [2022-02-16 13:58:07,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:58:07,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:07,080 INFO L229 MonitoredProcess]: Starting monitored process 533 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:07,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Waiting until timeout for monitored process [2022-02-16 13:58:07,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:58:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:07,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:07,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:07,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:07,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:07,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:07,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039404360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:07,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:07,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:07,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512552304] [2022-02-16 13:58:07,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:07,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:07,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:07,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:07,954 INFO L87 Difference]: Start difference. First operand 240 states and 631 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:08,255 INFO L93 Difference]: Finished difference Result 387 states and 881 transitions. [2022-02-16 13:58:08,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:58:08,255 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:08,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:08,256 INFO L225 Difference]: With dead ends: 387 [2022-02-16 13:58:08,256 INFO L226 Difference]: Without dead ends: 387 [2022-02-16 13:58:08,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:58:08,256 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 209 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:08,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 141 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-16 13:58:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 238. [2022-02-16 13:58:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.6244725738396624) internal successors, (622), 237 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 622 transitions. [2022-02-16 13:58:08,259 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 622 transitions. Word has length 20 [2022-02-16 13:58:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:08,259 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 622 transitions. [2022-02-16 13:58:08,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 622 transitions. [2022-02-16 13:58:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:08,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:08,260 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:08,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Ended with exit code 0 [2022-02-16 13:58:08,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2022-02-16 13:58:08,469 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1608277834, now seen corresponding path program 533 times [2022-02-16 13:58:08,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:08,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71297596] [2022-02-16 13:58:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:08,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:08,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:08,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71297596] [2022-02-16 13:58:08,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71297596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:08,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799133576] [2022-02-16 13:58:08,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:58:08,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:08,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:08,559 INFO L229 MonitoredProcess]: Starting monitored process 534 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:08,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Waiting until timeout for monitored process [2022-02-16 13:58:08,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:58:08,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:08,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:08,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:08,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:09,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:09,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:09,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:09,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799133576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:09,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:09,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:58:09,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150744356] [2022-02-16 13:58:09,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:09,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:58:09,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:09,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:58:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:58:09,156 INFO L87 Difference]: Start difference. First operand 238 states and 622 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:09,352 INFO L93 Difference]: Finished difference Result 388 states and 880 transitions. [2022-02-16 13:58:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:09,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:09,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:09,353 INFO L225 Difference]: With dead ends: 388 [2022-02-16 13:58:09,353 INFO L226 Difference]: Without dead ends: 386 [2022-02-16 13:58:09,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:58:09,353 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 200 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:09,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 100 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-16 13:58:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 241. [2022-02-16 13:58:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.620833333333333) internal successors, (629), 240 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 629 transitions. [2022-02-16 13:58:09,356 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 629 transitions. Word has length 20 [2022-02-16 13:58:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:09,356 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 629 transitions. [2022-02-16 13:58:09,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:09,356 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 629 transitions. [2022-02-16 13:58:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:09,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:09,357 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:09,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Ended with exit code 0 [2022-02-16 13:58:09,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2022-02-16 13:58:09,571 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash -493180038, now seen corresponding path program 534 times [2022-02-16 13:58:09,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:09,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821103955] [2022-02-16 13:58:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:09,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:09,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:09,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821103955] [2022-02-16 13:58:09,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821103955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:09,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734769858] [2022-02-16 13:58:09,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:58:09,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:09,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:09,671 INFO L229 MonitoredProcess]: Starting monitored process 535 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:09,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Waiting until timeout for monitored process [2022-02-16 13:58:10,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:58:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:10,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:10,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:10,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:10,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:10,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734769858] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:10,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:10,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:10,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523219702] [2022-02-16 13:58:10,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:10,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:10,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:10,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:10,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:10,614 INFO L87 Difference]: Start difference. First operand 241 states and 629 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:11,055 INFO L93 Difference]: Finished difference Result 390 states and 886 transitions. [2022-02-16 13:58:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:58:11,055 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:11,055 INFO L225 Difference]: With dead ends: 390 [2022-02-16 13:58:11,055 INFO L226 Difference]: Without dead ends: 390 [2022-02-16 13:58:11,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:58:11,056 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:11,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 180 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:11,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-16 13:58:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 239. [2022-02-16 13:58:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.6134453781512605) internal successors, (622), 238 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 622 transitions. [2022-02-16 13:58:11,059 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 622 transitions. Word has length 20 [2022-02-16 13:58:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:11,059 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 622 transitions. [2022-02-16 13:58:11,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 622 transitions. [2022-02-16 13:58:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:11,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:11,059 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:11,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:11,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,535 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:11,260 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:11,260 INFO L85 PathProgramCache]: Analyzing trace with hash -923281692, now seen corresponding path program 535 times [2022-02-16 13:58:11,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:11,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285006125] [2022-02-16 13:58:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:11,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:11,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:11,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285006125] [2022-02-16 13:58:11,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285006125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:11,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505142024] [2022-02-16 13:58:11,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:58:11,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:11,388 INFO L229 MonitoredProcess]: Starting monitored process 536 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:11,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Waiting until timeout for monitored process [2022-02-16 13:58:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:11,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:58:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:12,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:12,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:12,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:12,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505142024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:12,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:12,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:12,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409344950] [2022-02-16 13:58:12,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:12,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:12,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:12,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:12,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:12,244 INFO L87 Difference]: Start difference. First operand 239 states and 622 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:12,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:12,440 INFO L93 Difference]: Finished difference Result 358 states and 840 transitions. [2022-02-16 13:58:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:12,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:12,441 INFO L225 Difference]: With dead ends: 358 [2022-02-16 13:58:12,441 INFO L226 Difference]: Without dead ends: 358 [2022-02-16 13:58:12,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:58:12,441 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 151 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:12,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 84 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-16 13:58:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 240. [2022-02-16 13:58:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.6192468619246863) internal successors, (626), 239 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2022-02-16 13:58:12,444 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 20 [2022-02-16 13:58:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:12,444 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2022-02-16 13:58:12,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2022-02-16 13:58:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:12,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:12,444 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:12,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:12,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,536 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:12,646 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:12,646 INFO L85 PathProgramCache]: Analyzing trace with hash -233559768, now seen corresponding path program 536 times [2022-02-16 13:58:12,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:12,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72172929] [2022-02-16 13:58:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:12,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:12,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:12,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72172929] [2022-02-16 13:58:12,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72172929] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:12,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326010607] [2022-02-16 13:58:12,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:58:12,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:12,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:12,745 INFO L229 MonitoredProcess]: Starting monitored process 537 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:12,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Waiting until timeout for monitored process [2022-02-16 13:58:13,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:58:13,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:13,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:13,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:13,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:58:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:13,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:13,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:13,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:13,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326010607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:13,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:13,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:13,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910629931] [2022-02-16 13:58:13,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:13,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:13,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:13,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:13,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:13,492 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:13,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:13,746 INFO L93 Difference]: Finished difference Result 365 states and 846 transitions. [2022-02-16 13:58:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:13,747 INFO L225 Difference]: With dead ends: 365 [2022-02-16 13:58:13,747 INFO L226 Difference]: Without dead ends: 365 [2022-02-16 13:58:13,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:58:13,747 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:13,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 123 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-16 13:58:13,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 236. [2022-02-16 13:58:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.6042553191489364) internal successors, (612), 235 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 612 transitions. [2022-02-16 13:58:13,750 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 612 transitions. Word has length 20 [2022-02-16 13:58:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:13,750 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 612 transitions. [2022-02-16 13:58:13,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:13,750 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 612 transitions. [2022-02-16 13:58:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:13,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:13,750 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:13,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:13,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2022-02-16 13:58:13,963 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -528986950, now seen corresponding path program 537 times [2022-02-16 13:58:13,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:13,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603734745] [2022-02-16 13:58:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:13,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:14,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:14,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603734745] [2022-02-16 13:58:14,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603734745] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:14,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970810083] [2022-02-16 13:58:14,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:58:14,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:14,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:14,033 INFO L229 MonitoredProcess]: Starting monitored process 538 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:14,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Waiting until timeout for monitored process [2022-02-16 13:58:14,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:58:14,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:14,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:14,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:14,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:14,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:14,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:14,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970810083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:14,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:14,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:14,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090832225] [2022-02-16 13:58:14,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:14,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:14,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:14,702 INFO L87 Difference]: Start difference. First operand 236 states and 612 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:14,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:14,839 INFO L93 Difference]: Finished difference Result 326 states and 782 transitions. [2022-02-16 13:58:14,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:14,839 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:14,839 INFO L225 Difference]: With dead ends: 326 [2022-02-16 13:58:14,839 INFO L226 Difference]: Without dead ends: 326 [2022-02-16 13:58:14,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:58:14,840 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:14,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 73 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-16 13:58:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 234. [2022-02-16 13:58:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.59656652360515) internal successors, (605), 233 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 605 transitions. [2022-02-16 13:58:14,842 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 605 transitions. Word has length 20 [2022-02-16 13:58:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:14,842 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 605 transitions. [2022-02-16 13:58:14,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:14,843 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 605 transitions. [2022-02-16 13:58:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:14,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:14,843 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:14,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:15,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,538 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:15,051 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash -693196346, now seen corresponding path program 538 times [2022-02-16 13:58:15,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:15,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714818469] [2022-02-16 13:58:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:15,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:15,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:15,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714818469] [2022-02-16 13:58:15,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714818469] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:15,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436206010] [2022-02-16 13:58:15,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:58:15,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:15,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:15,136 INFO L229 MonitoredProcess]: Starting monitored process 539 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:15,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Waiting until timeout for monitored process [2022-02-16 13:58:15,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:58:15,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:15,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:15,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:15,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:15,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:15,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:15,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:15,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436206010] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:15,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:15,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:58:15,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184561140] [2022-02-16 13:58:15,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:15,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:58:15,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:58:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:58:15,961 INFO L87 Difference]: Start difference. First operand 234 states and 605 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:16,109 INFO L93 Difference]: Finished difference Result 345 states and 808 transitions. [2022-02-16 13:58:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:16,109 INFO L225 Difference]: With dead ends: 345 [2022-02-16 13:58:16,109 INFO L226 Difference]: Without dead ends: 343 [2022-02-16 13:58:16,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:58:16,110 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:16,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 87 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-16 13:58:16,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 239. [2022-02-16 13:58:16,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.592436974789916) internal successors, (617), 238 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 617 transitions. [2022-02-16 13:58:16,112 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 617 transitions. Word has length 20 [2022-02-16 13:58:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:16,113 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 617 transitions. [2022-02-16 13:58:16,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 617 transitions. [2022-02-16 13:58:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:16,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:16,113 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:16,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Ended with exit code 0 [2022-02-16 13:58:16,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2022-02-16 13:58:16,316 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash 421901450, now seen corresponding path program 539 times [2022-02-16 13:58:16,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:16,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25423372] [2022-02-16 13:58:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:16,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:16,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:16,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25423372] [2022-02-16 13:58:16,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25423372] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:16,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236682768] [2022-02-16 13:58:16,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:58:16,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:16,392 INFO L229 MonitoredProcess]: Starting monitored process 540 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:16,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Waiting until timeout for monitored process [2022-02-16 13:58:16,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:58:16,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:16,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:17,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:17,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:17,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:17,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236682768] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:17,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:17,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:17,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917579122] [2022-02-16 13:58:17,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:17,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:17,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:17,210 INFO L87 Difference]: Start difference. First operand 239 states and 617 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:17,421 INFO L93 Difference]: Finished difference Result 347 states and 814 transitions. [2022-02-16 13:58:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:58:17,421 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:17,421 INFO L225 Difference]: With dead ends: 347 [2022-02-16 13:58:17,421 INFO L226 Difference]: Without dead ends: 347 [2022-02-16 13:58:17,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:58:17,422 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:17,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 95 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:17,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-16 13:58:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 238. [2022-02-16 13:58:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5949367088607596) internal successors, (615), 237 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 615 transitions. [2022-02-16 13:58:17,425 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 615 transitions. Word has length 20 [2022-02-16 13:58:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:17,425 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 615 transitions. [2022-02-16 13:58:17,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 615 transitions. [2022-02-16 13:58:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:17,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:17,425 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:17,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:17,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 540 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2022-02-16 13:58:17,638 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:17,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1905036388, now seen corresponding path program 540 times [2022-02-16 13:58:17,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:17,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298183130] [2022-02-16 13:58:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:17,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:17,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:17,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298183130] [2022-02-16 13:58:17,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298183130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:17,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163488905] [2022-02-16 13:58:17,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:58:17,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:17,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:17,735 INFO L229 MonitoredProcess]: Starting monitored process 541 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:17,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Waiting until timeout for monitored process [2022-02-16 13:58:18,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:58:18,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:18,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:18,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:18,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:18,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:18,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:18,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163488905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:18,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:18,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:18,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282581911] [2022-02-16 13:58:18,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:18,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:18,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:18,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:18,615 INFO L87 Difference]: Start difference. First operand 238 states and 615 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:18,811 INFO L93 Difference]: Finished difference Result 332 states and 795 transitions. [2022-02-16 13:58:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:18,811 INFO L225 Difference]: With dead ends: 332 [2022-02-16 13:58:18,811 INFO L226 Difference]: Without dead ends: 332 [2022-02-16 13:58:18,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:58:18,812 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:18,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 76 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-16 13:58:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 233. [2022-02-16 13:58:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5905172413793105) internal successors, (601), 232 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 601 transitions. [2022-02-16 13:58:18,814 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 601 transitions. Word has length 20 [2022-02-16 13:58:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:18,814 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 601 transitions. [2022-02-16 13:58:18,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 601 transitions. [2022-02-16 13:58:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:18,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:18,815 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:18,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:19,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,541 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:19,032 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash -694810566, now seen corresponding path program 541 times [2022-02-16 13:58:19,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:19,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791406050] [2022-02-16 13:58:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:19,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:19,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:19,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791406050] [2022-02-16 13:58:19,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791406050] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:19,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402252835] [2022-02-16 13:58:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:58:19,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:19,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:19,107 INFO L229 MonitoredProcess]: Starting monitored process 542 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:19,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Waiting until timeout for monitored process [2022-02-16 13:58:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:19,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:19,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:19,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:19,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:58:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:19,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402252835] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:19,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:19,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:58:19,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108333687] [2022-02-16 13:58:19,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:19,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:58:19,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:58:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:58:19,802 INFO L87 Difference]: Start difference. First operand 233 states and 601 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:19,993 INFO L93 Difference]: Finished difference Result 318 states and 760 transitions. [2022-02-16 13:58:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:19,994 INFO L225 Difference]: With dead ends: 318 [2022-02-16 13:58:19,994 INFO L226 Difference]: Without dead ends: 315 [2022-02-16 13:58:19,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:58:19,994 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:19,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 91 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-02-16 13:58:19,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 235. [2022-02-16 13:58:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.5854700854700856) internal successors, (605), 234 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 605 transitions. [2022-02-16 13:58:19,997 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 605 transitions. Word has length 20 [2022-02-16 13:58:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:19,997 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 605 transitions. [2022-02-16 13:58:19,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 605 transitions. [2022-02-16 13:58:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:19,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:19,998 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:20,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:20,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2022-02-16 13:58:20,212 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash -486517258, now seen corresponding path program 542 times [2022-02-16 13:58:20,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:20,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530659922] [2022-02-16 13:58:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:20,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:20,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:20,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530659922] [2022-02-16 13:58:20,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530659922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:20,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412996752] [2022-02-16 13:58:20,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:58:20,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:20,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:20,300 INFO L229 MonitoredProcess]: Starting monitored process 543 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:20,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Waiting until timeout for monitored process [2022-02-16 13:58:20,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:58:20,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:20,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:58:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:20,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:20,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:20,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:58:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:21,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412996752] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:21,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:21,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:58:21,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044229948] [2022-02-16 13:58:21,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:21,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:58:21,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:58:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:58:21,088 INFO L87 Difference]: Start difference. First operand 235 states and 605 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:21,316 INFO L93 Difference]: Finished difference Result 331 states and 777 transitions. [2022-02-16 13:58:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:21,317 INFO L225 Difference]: With dead ends: 331 [2022-02-16 13:58:21,317 INFO L226 Difference]: Without dead ends: 329 [2022-02-16 13:58:21,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:58:21,317 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:21,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 76 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-16 13:58:21,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 238. [2022-02-16 13:58:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5822784810126582) internal successors, (612), 237 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 612 transitions. [2022-02-16 13:58:21,320 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 612 transitions. Word has length 20 [2022-02-16 13:58:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:21,320 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 612 transitions. [2022-02-16 13:58:21,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 612 transitions. [2022-02-16 13:58:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:21,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:21,321 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:21,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:21,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2022-02-16 13:58:21,535 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash 628580538, now seen corresponding path program 543 times [2022-02-16 13:58:21,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:21,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238719139] [2022-02-16 13:58:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:21,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:21,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:21,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238719139] [2022-02-16 13:58:21,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238719139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:21,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325274869] [2022-02-16 13:58:21,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:58:21,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:21,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:21,617 INFO L229 MonitoredProcess]: Starting monitored process 544 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:21,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Waiting until timeout for monitored process [2022-02-16 13:58:21,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:58:21,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:21,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:21,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:22,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:58:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:22,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:22,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:22,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:58:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:22,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325274869] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:22,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:22,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:58:22,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502464661] [2022-02-16 13:58:22,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:22,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:58:22,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:22,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:58:22,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:58:22,387 INFO L87 Difference]: Start difference. First operand 238 states and 612 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:22,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:22,563 INFO L93 Difference]: Finished difference Result 318 states and 763 transitions. [2022-02-16 13:58:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:22,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:22,564 INFO L225 Difference]: With dead ends: 318 [2022-02-16 13:58:22,564 INFO L226 Difference]: Without dead ends: 318 [2022-02-16 13:58:22,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:58:22,564 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:22,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 76 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:22,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-16 13:58:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 234. [2022-02-16 13:58:22,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.587982832618026) internal successors, (603), 233 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 603 transitions. [2022-02-16 13:58:22,567 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 603 transitions. Word has length 20 [2022-02-16 13:58:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:22,567 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 603 transitions. [2022-02-16 13:58:22,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 603 transitions. [2022-02-16 13:58:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:22,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:22,567 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:22,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Ended with exit code 0 [2022-02-16 13:58:22,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2022-02-16 13:58:22,769 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:22,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:22,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1753974436, now seen corresponding path program 544 times [2022-02-16 13:58:22,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:22,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189361042] [2022-02-16 13:58:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:22,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:22,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:22,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189361042] [2022-02-16 13:58:22,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189361042] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:22,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464419772] [2022-02-16 13:58:22,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:58:22,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:22,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:22,856 INFO L229 MonitoredProcess]: Starting monitored process 545 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:22,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Waiting until timeout for monitored process [2022-02-16 13:58:23,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:58:23,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:23,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:23,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:23,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:23,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:23,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464419772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:23,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:23,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:58:23,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642761226] [2022-02-16 13:58:23,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:23,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:58:23,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:58:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:58:23,613 INFO L87 Difference]: Start difference. First operand 234 states and 603 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:23,815 INFO L93 Difference]: Finished difference Result 333 states and 781 transitions. [2022-02-16 13:58:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:23,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:23,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:23,816 INFO L225 Difference]: With dead ends: 333 [2022-02-16 13:58:23,816 INFO L226 Difference]: Without dead ends: 331 [2022-02-16 13:58:23,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:58:23,816 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:23,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 97 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:23,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-16 13:58:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 239. [2022-02-16 13:58:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.5840336134453783) internal successors, (615), 238 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 615 transitions. [2022-02-16 13:58:23,819 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 615 transitions. Word has length 20 [2022-02-16 13:58:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:23,819 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 615 transitions. [2022-02-16 13:58:23,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 615 transitions. [2022-02-16 13:58:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:23,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:23,820 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:23,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:24,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2022-02-16 13:58:24,038 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:24,038 INFO L85 PathProgramCache]: Analyzing trace with hash -638876640, now seen corresponding path program 545 times [2022-02-16 13:58:24,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:24,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597305194] [2022-02-16 13:58:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:24,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:24,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:24,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597305194] [2022-02-16 13:58:24,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597305194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:24,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621529297] [2022-02-16 13:58:24,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:58:24,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:24,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:24,140 INFO L229 MonitoredProcess]: Starting monitored process 546 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:24,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Waiting until timeout for monitored process [2022-02-16 13:58:24,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:58:24,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:24,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:24,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:24,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:24,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:24,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:24,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621529297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:24,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:24,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:58:24,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307454629] [2022-02-16 13:58:24,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:24,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:58:24,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:58:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:58:24,908 INFO L87 Difference]: Start difference. First operand 239 states and 615 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:25,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:25,121 INFO L93 Difference]: Finished difference Result 333 states and 783 transitions. [2022-02-16 13:58:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:58:25,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:25,122 INFO L225 Difference]: With dead ends: 333 [2022-02-16 13:58:25,122 INFO L226 Difference]: Without dead ends: 333 [2022-02-16 13:58:25,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:58:25,122 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:25,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 75 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:25,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-02-16 13:58:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 238. [2022-02-16 13:58:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.586497890295359) internal successors, (613), 237 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 613 transitions. [2022-02-16 13:58:25,125 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 613 transitions. Word has length 20 [2022-02-16 13:58:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:25,125 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 613 transitions. [2022-02-16 13:58:25,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 613 transitions. [2022-02-16 13:58:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:25,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:25,125 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:25,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:25,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2022-02-16 13:58:25,335 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:25,335 INFO L85 PathProgramCache]: Analyzing trace with hash 844258298, now seen corresponding path program 546 times [2022-02-16 13:58:25,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:25,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860289266] [2022-02-16 13:58:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:25,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:25,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:25,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860289266] [2022-02-16 13:58:25,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860289266] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:25,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542914728] [2022-02-16 13:58:25,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:58:25,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:25,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:25,440 INFO L229 MonitoredProcess]: Starting monitored process 547 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:25,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Waiting until timeout for monitored process [2022-02-16 13:58:25,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:58:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:25,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:26,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:26,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:58:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:26,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542914728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:26,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:26,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:58:26,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274326179] [2022-02-16 13:58:26,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:26,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:58:26,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:58:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:58:26,167 INFO L87 Difference]: Start difference. First operand 238 states and 613 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:26,342 INFO L93 Difference]: Finished difference Result 321 states and 769 transitions. [2022-02-16 13:58:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:26,343 INFO L225 Difference]: With dead ends: 321 [2022-02-16 13:58:26,343 INFO L226 Difference]: Without dead ends: 321 [2022-02-16 13:58:26,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:58:26,343 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:26,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 82 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-16 13:58:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 232. [2022-02-16 13:58:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5844155844155843) internal successors, (597), 231 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 597 transitions. [2022-02-16 13:58:26,346 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 597 transitions. Word has length 20 [2022-02-16 13:58:26,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:26,346 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 597 transitions. [2022-02-16 13:58:26,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 597 transitions. [2022-02-16 13:58:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:26,346 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:26,347 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:26,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Ended with exit code 0 [2022-02-16 13:58:26,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2022-02-16 13:58:26,547 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:26,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:26,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1611499756, now seen corresponding path program 547 times [2022-02-16 13:58:26,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:26,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077247363] [2022-02-16 13:58:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:26,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:26,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:26,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077247363] [2022-02-16 13:58:26,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077247363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:26,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839759222] [2022-02-16 13:58:26,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:58:26,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:26,663 INFO L229 MonitoredProcess]: Starting monitored process 548 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:26,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Waiting until timeout for monitored process [2022-02-16 13:58:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:27,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:27,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:27,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:27,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:27,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:27,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839759222] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:27,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:27,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:27,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552414956] [2022-02-16 13:58:27,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:27,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:27,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:27,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:27,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:27,534 INFO L87 Difference]: Start difference. First operand 232 states and 597 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:27,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:27,874 INFO L93 Difference]: Finished difference Result 442 states and 968 transitions. [2022-02-16 13:58:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:27,874 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:27,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:27,874 INFO L225 Difference]: With dead ends: 442 [2022-02-16 13:58:27,874 INFO L226 Difference]: Without dead ends: 442 [2022-02-16 13:58:27,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:58:27,875 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 261 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:27,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 134 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-02-16 13:58:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 237. [2022-02-16 13:58:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.593220338983051) internal successors, (612), 236 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 612 transitions. [2022-02-16 13:58:27,878 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 612 transitions. Word has length 20 [2022-02-16 13:58:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:27,878 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 612 transitions. [2022-02-16 13:58:27,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 612 transitions. [2022-02-16 13:58:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:27,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:27,878 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:27,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:28,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,548 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:28,095 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1968934684, now seen corresponding path program 548 times [2022-02-16 13:58:28,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:28,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748152641] [2022-02-16 13:58:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:28,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:28,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:28,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748152641] [2022-02-16 13:58:28,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748152641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:28,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44782911] [2022-02-16 13:58:28,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:58:28,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:28,204 INFO L229 MonitoredProcess]: Starting monitored process 549 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:28,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Waiting until timeout for monitored process [2022-02-16 13:58:28,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:58:28,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:28,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:28,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:28,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:29,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:29,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:29,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44782911] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:29,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:29,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:58:29,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398945646] [2022-02-16 13:58:29,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:29,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:58:29,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:29,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:58:29,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:58:29,142 INFO L87 Difference]: Start difference. First operand 237 states and 612 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:29,449 INFO L93 Difference]: Finished difference Result 433 states and 957 transitions. [2022-02-16 13:58:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:58:29,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:29,449 INFO L225 Difference]: With dead ends: 433 [2022-02-16 13:58:29,450 INFO L226 Difference]: Without dead ends: 432 [2022-02-16 13:58:29,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:58:29,450 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 192 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:29,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 137 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-02-16 13:58:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 234. [2022-02-16 13:58:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.592274678111588) internal successors, (604), 233 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 604 transitions. [2022-02-16 13:58:29,453 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 604 transitions. Word has length 20 [2022-02-16 13:58:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:29,453 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 604 transitions. [2022-02-16 13:58:29,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 604 transitions. [2022-02-16 13:58:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:29,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:29,453 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:29,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Ended with exit code 0 [2022-02-16 13:58:29,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2022-02-16 13:58:29,654 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:29,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:29,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1819793064, now seen corresponding path program 549 times [2022-02-16 13:58:29,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:29,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600927164] [2022-02-16 13:58:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:29,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:29,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:29,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600927164] [2022-02-16 13:58:29,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600927164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:29,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507870542] [2022-02-16 13:58:29,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:58:29,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:29,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:29,772 INFO L229 MonitoredProcess]: Starting monitored process 550 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:29,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Waiting until timeout for monitored process [2022-02-16 13:58:30,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:58:30,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:30,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:30,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:30,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:30,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:30,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:30,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507870542] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:30,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:30,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:30,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421984300] [2022-02-16 13:58:30,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:30,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:30,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:30,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:30,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:30,673 INFO L87 Difference]: Start difference. First operand 234 states and 604 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:31,020 INFO L93 Difference]: Finished difference Result 450 states and 992 transitions. [2022-02-16 13:58:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:31,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:31,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:31,021 INFO L225 Difference]: With dead ends: 450 [2022-02-16 13:58:31,021 INFO L226 Difference]: Without dead ends: 450 [2022-02-16 13:58:31,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:58:31,021 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 248 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:31,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 112 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-02-16 13:58:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 236. [2022-02-16 13:58:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.608510638297872) internal successors, (613), 235 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 613 transitions. [2022-02-16 13:58:31,025 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 613 transitions. Word has length 20 [2022-02-16 13:58:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:31,025 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 613 transitions. [2022-02-16 13:58:31,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 613 transitions. [2022-02-16 13:58:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:31,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:31,025 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:31,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Ended with exit code 0 [2022-02-16 13:58:31,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,550 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:31,239 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:31,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:31,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1785452308, now seen corresponding path program 550 times [2022-02-16 13:58:31,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:31,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492679635] [2022-02-16 13:58:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:31,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:31,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:31,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492679635] [2022-02-16 13:58:31,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492679635] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:31,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994222886] [2022-02-16 13:58:31,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:58:31,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:31,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:31,356 INFO L229 MonitoredProcess]: Starting monitored process 551 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:31,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Waiting until timeout for monitored process [2022-02-16 13:58:31,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:58:31,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:31,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:31,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:31,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:32,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:32,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:32,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:32,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994222886] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:32,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:32,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:32,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541487639] [2022-02-16 13:58:32,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:32,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:32,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:32,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:32,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:32,363 INFO L87 Difference]: Start difference. First operand 236 states and 613 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:32,951 INFO L93 Difference]: Finished difference Result 448 states and 989 transitions. [2022-02-16 13:58:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:58:32,951 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:32,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:32,952 INFO L225 Difference]: With dead ends: 448 [2022-02-16 13:58:32,952 INFO L226 Difference]: Without dead ends: 448 [2022-02-16 13:58:32,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:58:32,952 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 162 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:32,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 189 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-16 13:58:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-02-16 13:58:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 234. [2022-02-16 13:58:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.592274678111588) internal successors, (604), 233 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 604 transitions. [2022-02-16 13:58:32,956 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 604 transitions. Word has length 20 [2022-02-16 13:58:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:32,956 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 604 transitions. [2022-02-16 13:58:32,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 604 transitions. [2022-02-16 13:58:32,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:32,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:32,956 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:32,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Ended with exit code 0 [2022-02-16 13:58:33,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2022-02-16 13:58:33,157 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:33,157 INFO L85 PathProgramCache]: Analyzing trace with hash -132660256, now seen corresponding path program 551 times [2022-02-16 13:58:33,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:33,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718086441] [2022-02-16 13:58:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:33,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:33,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:33,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718086441] [2022-02-16 13:58:33,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718086441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:33,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940321610] [2022-02-16 13:58:33,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:58:33,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:33,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:33,309 INFO L229 MonitoredProcess]: Starting monitored process 552 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:33,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Waiting until timeout for monitored process [2022-02-16 13:58:33,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:58:33,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:33,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:33,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-02-16 13:58:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:34,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:34,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:34,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:34,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940321610] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:34,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:34,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:58:34,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806474441] [2022-02-16 13:58:34,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:34,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:58:34,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:34,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:58:34,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:58:34,331 INFO L87 Difference]: Start difference. First operand 234 states and 604 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:34,796 INFO L93 Difference]: Finished difference Result 451 states and 991 transitions. [2022-02-16 13:58:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:34,797 INFO L225 Difference]: With dead ends: 451 [2022-02-16 13:58:34,797 INFO L226 Difference]: Without dead ends: 449 [2022-02-16 13:58:34,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:58:34,797 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 179 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:34,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 153 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-16 13:58:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 237. [2022-02-16 13:58:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.593220338983051) internal successors, (612), 236 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 612 transitions. [2022-02-16 13:58:34,800 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 612 transitions. Word has length 20 [2022-02-16 13:58:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:34,800 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 612 transitions. [2022-02-16 13:58:34,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 612 transitions. [2022-02-16 13:58:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:34,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:34,800 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:34,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:35,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2022-02-16 13:58:35,001 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash 982437540, now seen corresponding path program 552 times [2022-02-16 13:58:35,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:35,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211334761] [2022-02-16 13:58:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:35,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:35,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:35,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211334761] [2022-02-16 13:58:35,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211334761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:35,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613311230] [2022-02-16 13:58:35,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:58:35,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:35,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:35,102 INFO L229 MonitoredProcess]: Starting monitored process 553 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:35,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Waiting until timeout for monitored process [2022-02-16 13:58:35,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:58:35,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:35,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:35,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-02-16 13:58:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:35,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:35,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:35,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:35,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613311230] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:35,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:35,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:35,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476982741] [2022-02-16 13:58:35,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:35,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:35,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:35,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:35,988 INFO L87 Difference]: Start difference. First operand 237 states and 612 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:36,518 INFO L93 Difference]: Finished difference Result 453 states and 997 transitions. [2022-02-16 13:58:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-16 13:58:36,518 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:36,519 INFO L225 Difference]: With dead ends: 453 [2022-02-16 13:58:36,519 INFO L226 Difference]: Without dead ends: 453 [2022-02-16 13:58:36,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-02-16 13:58:36,519 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 162 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:36,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 199 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:36,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-02-16 13:58:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 235. [2022-02-16 13:58:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.576923076923077) internal successors, (603), 234 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 603 transitions. [2022-02-16 13:58:36,523 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 603 transitions. Word has length 20 [2022-02-16 13:58:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:36,523 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 603 transitions. [2022-02-16 13:58:36,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 603 transitions. [2022-02-16 13:58:36,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:36,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:36,523 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:36,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:36,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2022-02-16 13:58:36,727 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash 552335886, now seen corresponding path program 553 times [2022-02-16 13:58:36,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:36,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645692125] [2022-02-16 13:58:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:36,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:36,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:36,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645692125] [2022-02-16 13:58:36,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645692125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:36,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510855258] [2022-02-16 13:58:36,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:58:36,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:36,819 INFO L229 MonitoredProcess]: Starting monitored process 554 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:36,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Waiting until timeout for monitored process [2022-02-16 13:58:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:37,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:37,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:37,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:58:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:37,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:37,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:37,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:37,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510855258] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:37,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:37,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:37,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798141966] [2022-02-16 13:58:37,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:37,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:37,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:37,542 INFO L87 Difference]: Start difference. First operand 235 states and 603 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:37,744 INFO L93 Difference]: Finished difference Result 430 states and 984 transitions. [2022-02-16 13:58:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:37,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:37,745 INFO L225 Difference]: With dead ends: 430 [2022-02-16 13:58:37,745 INFO L226 Difference]: Without dead ends: 430 [2022-02-16 13:58:37,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:58:37,745 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 151 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:37,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 133 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-02-16 13:58:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 239. [2022-02-16 13:58:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.600840336134454) internal successors, (619), 238 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 619 transitions. [2022-02-16 13:58:37,749 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 619 transitions. Word has length 20 [2022-02-16 13:58:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:37,749 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 619 transitions. [2022-02-16 13:58:37,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 619 transitions. [2022-02-16 13:58:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:37,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:37,749 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:37,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:37,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2022-02-16 13:58:37,966 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:37,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1242057810, now seen corresponding path program 554 times [2022-02-16 13:58:37,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:37,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074927118] [2022-02-16 13:58:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:37,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:38,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:38,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074927118] [2022-02-16 13:58:38,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074927118] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:38,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254985356] [2022-02-16 13:58:38,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:58:38,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:38,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:38,037 INFO L229 MonitoredProcess]: Starting monitored process 555 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:38,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Waiting until timeout for monitored process [2022-02-16 13:58:38,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:58:38,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:38,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:38,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:58:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:38,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:38,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:38,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:38,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254985356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:38,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:38,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:38,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524231911] [2022-02-16 13:58:38,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:38,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:38,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:38,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:38,722 INFO L87 Difference]: Start difference. First operand 239 states and 619 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:38,977 INFO L93 Difference]: Finished difference Result 437 states and 990 transitions. [2022-02-16 13:58:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:38,978 INFO L225 Difference]: With dead ends: 437 [2022-02-16 13:58:38,978 INFO L226 Difference]: Without dead ends: 437 [2022-02-16 13:58:38,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:58:38,978 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 144 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:38,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 124 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-02-16 13:58:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 237. [2022-02-16 13:58:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.5847457627118646) internal successors, (610), 236 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 610 transitions. [2022-02-16 13:58:38,982 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 610 transitions. Word has length 20 [2022-02-16 13:58:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:38,982 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 610 transitions. [2022-02-16 13:58:38,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 610 transitions. [2022-02-16 13:58:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:38,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:38,982 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:38,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Ended with exit code 0 [2022-02-16 13:58:39,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,555 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:39,189 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:39,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:39,190 INFO L85 PathProgramCache]: Analyzing trace with hash 946630628, now seen corresponding path program 555 times [2022-02-16 13:58:39,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:39,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298969923] [2022-02-16 13:58:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:39,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:39,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:39,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298969923] [2022-02-16 13:58:39,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298969923] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:39,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292716312] [2022-02-16 13:58:39,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:58:39,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:39,279 INFO L229 MonitoredProcess]: Starting monitored process 556 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:39,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Waiting until timeout for monitored process [2022-02-16 13:58:39,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:58:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:39,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:39,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:40,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:40,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:40,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292716312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:40,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:40,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:40,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421937411] [2022-02-16 13:58:40,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:40,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:40,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:40,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:40,037 INFO L87 Difference]: Start difference. First operand 237 states and 610 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:40,230 INFO L93 Difference]: Finished difference Result 398 states and 926 transitions. [2022-02-16 13:58:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:40,231 INFO L225 Difference]: With dead ends: 398 [2022-02-16 13:58:40,231 INFO L226 Difference]: Without dead ends: 398 [2022-02-16 13:58:40,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:58:40,232 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:40,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 107 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-16 13:58:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 235. [2022-02-16 13:58:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.576923076923077) internal successors, (603), 234 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 603 transitions. [2022-02-16 13:58:40,235 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 603 transitions. Word has length 20 [2022-02-16 13:58:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:40,235 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 603 transitions. [2022-02-16 13:58:40,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 603 transitions. [2022-02-16 13:58:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:40,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:40,235 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:40,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:40,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2022-02-16 13:58:40,451 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash 782421232, now seen corresponding path program 556 times [2022-02-16 13:58:40,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:40,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797130367] [2022-02-16 13:58:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:40,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:40,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:40,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797130367] [2022-02-16 13:58:40,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797130367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:40,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805776274] [2022-02-16 13:58:40,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:58:40,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:40,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:40,519 INFO L229 MonitoredProcess]: Starting monitored process 557 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:40,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Waiting until timeout for monitored process [2022-02-16 13:58:40,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:58:40,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:40,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:40,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:41,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:41,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:41,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:41,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:41,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805776274] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:41,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:41,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-16 13:58:41,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542276181] [2022-02-16 13:58:41,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:41,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 13:58:41,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 13:58:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:58:41,411 INFO L87 Difference]: Start difference. First operand 235 states and 603 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:41,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:41,720 INFO L93 Difference]: Finished difference Result 422 states and 958 transitions. [2022-02-16 13:58:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:41,721 INFO L225 Difference]: With dead ends: 422 [2022-02-16 13:58:41,721 INFO L226 Difference]: Without dead ends: 420 [2022-02-16 13:58:41,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:58:41,721 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:41,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 136 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-02-16 13:58:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 239. [2022-02-16 13:58:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.588235294117647) internal successors, (616), 238 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 616 transitions. [2022-02-16 13:58:41,725 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 616 transitions. Word has length 20 [2022-02-16 13:58:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:41,725 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 616 transitions. [2022-02-16 13:58:41,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 616 transitions. [2022-02-16 13:58:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:41,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:41,725 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:41,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:41,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 557 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2022-02-16 13:58:41,930 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1897519028, now seen corresponding path program 557 times [2022-02-16 13:58:41,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:41,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829452440] [2022-02-16 13:58:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:41,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:42,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:42,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829452440] [2022-02-16 13:58:42,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829452440] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:42,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066293837] [2022-02-16 13:58:42,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:58:42,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:42,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:42,042 INFO L229 MonitoredProcess]: Starting monitored process 558 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:42,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Waiting until timeout for monitored process [2022-02-16 13:58:42,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:58:42,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:42,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:42,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:42,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:42,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:42,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066293837] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:42,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:42,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:42,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466266438] [2022-02-16 13:58:42,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:42,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:42,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:42,891 INFO L87 Difference]: Start difference. First operand 239 states and 616 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:43,193 INFO L93 Difference]: Finished difference Result 424 states and 964 transitions. [2022-02-16 13:58:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:58:43,193 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:43,194 INFO L225 Difference]: With dead ends: 424 [2022-02-16 13:58:43,194 INFO L226 Difference]: Without dead ends: 424 [2022-02-16 13:58:43,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-02-16 13:58:43,198 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:43,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 123 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-02-16 13:58:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 237. [2022-02-16 13:58:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.580508474576271) internal successors, (609), 236 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 609 transitions. [2022-02-16 13:58:43,203 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 609 transitions. Word has length 20 [2022-02-16 13:58:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:43,203 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 609 transitions. [2022-02-16 13:58:43,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 609 transitions. [2022-02-16 13:58:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:43,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:43,204 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:43,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:43,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2022-02-16 13:58:43,427 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:43,427 INFO L85 PathProgramCache]: Analyzing trace with hash -914313330, now seen corresponding path program 558 times [2022-02-16 13:58:43,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:43,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053024075] [2022-02-16 13:58:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:43,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:43,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:43,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053024075] [2022-02-16 13:58:43,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053024075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:43,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623443419] [2022-02-16 13:58:43,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:58:43,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:43,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:43,529 INFO L229 MonitoredProcess]: Starting monitored process 559 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:43,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Waiting until timeout for monitored process [2022-02-16 13:58:43,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:58:43,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:43,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:43,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:44,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:44,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:44,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:44,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623443419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:44,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:44,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:44,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072054636] [2022-02-16 13:58:44,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:44,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:44,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:44,380 INFO L87 Difference]: Start difference. First operand 237 states and 609 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:44,655 INFO L93 Difference]: Finished difference Result 406 states and 942 transitions. [2022-02-16 13:58:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:44,656 INFO L225 Difference]: With dead ends: 406 [2022-02-16 13:58:44,656 INFO L226 Difference]: Without dead ends: 406 [2022-02-16 13:58:44,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:58:44,656 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:44,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 103 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-02-16 13:58:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 235. [2022-02-16 13:58:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.5683760683760686) internal successors, (601), 234 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 601 transitions. [2022-02-16 13:58:44,659 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 601 transitions. Word has length 20 [2022-02-16 13:58:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:44,659 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 601 transitions. [2022-02-16 13:58:44,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 601 transitions. [2022-02-16 13:58:44,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:44,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:44,660 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:44,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Ended with exit code 0 [2022-02-16 13:58:44,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2022-02-16 13:58:44,867 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash -508442204, now seen corresponding path program 559 times [2022-02-16 13:58:44,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:44,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673675872] [2022-02-16 13:58:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:44,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:44,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:44,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673675872] [2022-02-16 13:58:44,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673675872] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:44,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663283746] [2022-02-16 13:58:44,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:58:44,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:44,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:44,973 INFO L229 MonitoredProcess]: Starting monitored process 560 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:44,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Waiting until timeout for monitored process [2022-02-16 13:58:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:45,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:58:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:45,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:45,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:45,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:45,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663283746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:45,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:45,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:45,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808334817] [2022-02-16 13:58:45,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:45,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:45,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:45,842 INFO L87 Difference]: Start difference. First operand 235 states and 601 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:46,147 INFO L93 Difference]: Finished difference Result 447 states and 999 transitions. [2022-02-16 13:58:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:46,147 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:46,148 INFO L225 Difference]: With dead ends: 447 [2022-02-16 13:58:46,148 INFO L226 Difference]: Without dead ends: 447 [2022-02-16 13:58:46,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:58:46,148 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 142 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:46,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 168 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-16 13:58:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 236. [2022-02-16 13:58:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.574468085106383) internal successors, (605), 235 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 605 transitions. [2022-02-16 13:58:46,151 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 605 transitions. Word has length 20 [2022-02-16 13:58:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:46,151 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 605 transitions. [2022-02-16 13:58:46,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 605 transitions. [2022-02-16 13:58:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:46,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:46,152 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:46,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:46,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,560 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:46,359 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash 181279720, now seen corresponding path program 560 times [2022-02-16 13:58:46,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:46,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605027923] [2022-02-16 13:58:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:46,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:46,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:46,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605027923] [2022-02-16 13:58:46,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605027923] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:46,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231449603] [2022-02-16 13:58:46,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:58:46,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:46,448 INFO L229 MonitoredProcess]: Starting monitored process 561 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:46,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Waiting until timeout for monitored process [2022-02-16 13:58:46,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:58:46,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:46,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:46,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-16 13:58:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:47,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:47,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:47,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:47,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231449603] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:47,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:47,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:47,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933579543] [2022-02-16 13:58:47,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:47,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:47,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:47,222 INFO L87 Difference]: Start difference. First operand 236 states and 605 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:47,545 INFO L93 Difference]: Finished difference Result 460 states and 1016 transitions. [2022-02-16 13:58:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:47,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:47,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:47,545 INFO L225 Difference]: With dead ends: 460 [2022-02-16 13:58:47,545 INFO L226 Difference]: Without dead ends: 460 [2022-02-16 13:58:47,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2022-02-16 13:58:47,546 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 210 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:47,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 177 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-02-16 13:58:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 234. [2022-02-16 13:58:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.5579399141630903) internal successors, (596), 233 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 596 transitions. [2022-02-16 13:58:47,549 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 596 transitions. Word has length 20 [2022-02-16 13:58:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:47,549 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 596 transitions. [2022-02-16 13:58:47,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 596 transitions. [2022-02-16 13:58:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:47,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:47,550 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:47,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Ended with exit code 0 [2022-02-16 13:58:47,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,561 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:47,751 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:47,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:47,751 INFO L85 PathProgramCache]: Analyzing trace with hash -114147462, now seen corresponding path program 561 times [2022-02-16 13:58:47,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:47,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258474645] [2022-02-16 13:58:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:47,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:47,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:47,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258474645] [2022-02-16 13:58:47,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258474645] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:47,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963276942] [2022-02-16 13:58:47,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:58:47,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:47,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:47,881 INFO L229 MonitoredProcess]: Starting monitored process 562 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:47,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Waiting until timeout for monitored process [2022-02-16 13:58:48,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:58:48,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:48,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:48,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:48,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:48,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:48,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:48,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963276942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:48,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:48,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-16 13:58:48,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064703992] [2022-02-16 13:58:48,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:48,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 13:58:48,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 13:58:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:48,632 INFO L87 Difference]: Start difference. First operand 234 states and 596 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:48,903 INFO L93 Difference]: Finished difference Result 418 states and 944 transitions. [2022-02-16 13:58:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:48,904 INFO L225 Difference]: With dead ends: 418 [2022-02-16 13:58:48,904 INFO L226 Difference]: Without dead ends: 418 [2022-02-16 13:58:48,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-02-16 13:58:48,904 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 128 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:48,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 131 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-02-16 13:58:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 229. [2022-02-16 13:58:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.5482456140350878) internal successors, (581), 228 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 581 transitions. [2022-02-16 13:58:48,907 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 581 transitions. Word has length 20 [2022-02-16 13:58:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:48,907 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 581 transitions. [2022-02-16 13:58:48,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 581 transitions. [2022-02-16 13:58:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:48,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:48,908 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:48,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Ended with exit code 0 [2022-02-16 13:58:49,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2022-02-16 13:58:49,108 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:49,109 INFO L85 PathProgramCache]: Analyzing trace with hash -876234516, now seen corresponding path program 562 times [2022-02-16 13:58:49,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:49,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082900494] [2022-02-16 13:58:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:49,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:49,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:49,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082900494] [2022-02-16 13:58:49,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082900494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:49,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086725638] [2022-02-16 13:58:49,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:58:49,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:49,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:49,201 INFO L229 MonitoredProcess]: Starting monitored process 563 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:49,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Waiting until timeout for monitored process [2022-02-16 13:58:49,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:58:49,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:49,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:49,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:49,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:49,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086725638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:49,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:49,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:58:49,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509640161] [2022-02-16 13:58:49,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:49,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:58:49,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:58:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:58:49,980 INFO L87 Difference]: Start difference. First operand 229 states and 581 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:50,203 INFO L93 Difference]: Finished difference Result 422 states and 940 transitions. [2022-02-16 13:58:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:50,204 INFO L225 Difference]: With dead ends: 422 [2022-02-16 13:58:50,204 INFO L226 Difference]: Without dead ends: 422 [2022-02-16 13:58:50,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:58:50,204 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:50,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 115 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-02-16 13:58:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 227. [2022-02-16 13:58:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.5398230088495577) internal successors, (574), 226 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 574 transitions. [2022-02-16 13:58:50,207 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 574 transitions. Word has length 20 [2022-02-16 13:58:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:50,207 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 574 transitions. [2022-02-16 13:58:50,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 574 transitions. [2022-02-16 13:58:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:50,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:50,208 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:50,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:50,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2022-02-16 13:58:50,425 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1339134948, now seen corresponding path program 563 times [2022-02-16 13:58:50,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:50,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293644854] [2022-02-16 13:58:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:50,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:50,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:50,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293644854] [2022-02-16 13:58:50,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293644854] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:50,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082897536] [2022-02-16 13:58:50,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:58:50,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:50,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:50,510 INFO L229 MonitoredProcess]: Starting monitored process 564 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:50,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Waiting until timeout for monitored process [2022-02-16 13:58:50,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:58:50,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:50,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:50,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:51,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:51,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:51,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:51,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:51,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082897536] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:51,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:51,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:58:51,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756532463] [2022-02-16 13:58:51,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:51,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:58:51,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:58:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:58:51,334 INFO L87 Difference]: Start difference. First operand 227 states and 574 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:51,593 INFO L93 Difference]: Finished difference Result 433 states and 962 transitions. [2022-02-16 13:58:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:51,594 INFO L225 Difference]: With dead ends: 433 [2022-02-16 13:58:51,594 INFO L226 Difference]: Without dead ends: 431 [2022-02-16 13:58:51,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:58:51,594 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:51,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 122 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-16 13:58:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 234. [2022-02-16 13:58:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.5450643776824036) internal successors, (593), 233 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 593 transitions. [2022-02-16 13:58:51,597 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 593 transitions. Word has length 20 [2022-02-16 13:58:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:51,598 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 593 transitions. [2022-02-16 13:58:51,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 593 transitions. [2022-02-16 13:58:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:51,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:51,598 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:51,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Ended with exit code 0 [2022-02-16 13:58:51,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2022-02-16 13:58:51,804 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash -224037152, now seen corresponding path program 564 times [2022-02-16 13:58:51,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:51,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209090694] [2022-02-16 13:58:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:51,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:51,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:51,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209090694] [2022-02-16 13:58:51,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209090694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:51,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663519298] [2022-02-16 13:58:51,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:58:51,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:51,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:51,899 INFO L229 MonitoredProcess]: Starting monitored process 565 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:51,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Waiting until timeout for monitored process [2022-02-16 13:58:52,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:58:52,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:52,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:52,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:52,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:52,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:52,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:52,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663519298] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:52,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:52,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:58:52,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409471979] [2022-02-16 13:58:52,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:52,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:58:52,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:52,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:58:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:58:52,724 INFO L87 Difference]: Start difference. First operand 234 states and 593 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:53,078 INFO L93 Difference]: Finished difference Result 435 states and 968 transitions. [2022-02-16 13:58:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:58:53,078 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:53,079 INFO L225 Difference]: With dead ends: 435 [2022-02-16 13:58:53,079 INFO L226 Difference]: Without dead ends: 435 [2022-02-16 13:58:53,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-02-16 13:58:53,079 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 108 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:53,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 140 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-02-16 13:58:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 233. [2022-02-16 13:58:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.543103448275862) internal successors, (590), 232 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 590 transitions. [2022-02-16 13:58:53,082 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 590 transitions. Word has length 20 [2022-02-16 13:58:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:53,082 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 590 transitions. [2022-02-16 13:58:53,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 590 transitions. [2022-02-16 13:58:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:53,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:53,083 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:53,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Ended with exit code 0 [2022-02-16 13:58:53,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 565 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2022-02-16 13:58:53,300 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:53,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1259097786, now seen corresponding path program 565 times [2022-02-16 13:58:53,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:53,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825463366] [2022-02-16 13:58:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:53,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:53,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:53,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825463366] [2022-02-16 13:58:53,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825463366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:53,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096623115] [2022-02-16 13:58:53,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:58:53,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:53,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:53,395 INFO L229 MonitoredProcess]: Starting monitored process 566 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:53,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Waiting until timeout for monitored process [2022-02-16 13:58:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:54,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:54,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:54,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:54,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096623115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:54,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:54,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-16 13:58:54,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767729897] [2022-02-16 13:58:54,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:54,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-16 13:58:54,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-16 13:58:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:58:54,257 INFO L87 Difference]: Start difference. First operand 233 states and 590 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:54,611 INFO L93 Difference]: Finished difference Result 423 states and 956 transitions. [2022-02-16 13:58:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:54,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:54,612 INFO L225 Difference]: With dead ends: 423 [2022-02-16 13:58:54,612 INFO L226 Difference]: Without dead ends: 423 [2022-02-16 13:58:54,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:58:54,612 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:54,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 159 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-16 13:58:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 232. [2022-02-16 13:58:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5411255411255413) internal successors, (587), 231 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 587 transitions. [2022-02-16 13:58:54,615 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 587 transitions. Word has length 20 [2022-02-16 13:58:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:54,615 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 587 transitions. [2022-02-16 13:58:54,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 587 transitions. [2022-02-16 13:58:54,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:54,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:54,615 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:54,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Ended with exit code 0 [2022-02-16 13:58:54,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2022-02-16 13:58:54,831 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash -853330844, now seen corresponding path program 566 times [2022-02-16 13:58:54,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:54,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954277591] [2022-02-16 13:58:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:54,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:54,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:54,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954277591] [2022-02-16 13:58:54,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954277591] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:54,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586736410] [2022-02-16 13:58:54,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:58:54,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:54,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:54,919 INFO L229 MonitoredProcess]: Starting monitored process 567 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:54,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Waiting until timeout for monitored process [2022-02-16 13:58:55,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:58:55,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:55,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:55,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:55,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:55,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:58:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:55,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586736410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:55,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:55,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:58:55,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212328101] [2022-02-16 13:58:55,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:55,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:58:55,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:55,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:58:55,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:58:55,680 INFO L87 Difference]: Start difference. First operand 232 states and 587 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:55,999 INFO L93 Difference]: Finished difference Result 432 states and 966 transitions. [2022-02-16 13:58:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:56,000 INFO L225 Difference]: With dead ends: 432 [2022-02-16 13:58:56,000 INFO L226 Difference]: Without dead ends: 432 [2022-02-16 13:58:56,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:58:56,000 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:56,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 156 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:58:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-02-16 13:58:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 226. [2022-02-16 13:58:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.533333333333333) internal successors, (570), 225 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 570 transitions. [2022-02-16 13:58:56,003 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 570 transitions. Word has length 20 [2022-02-16 13:58:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:56,003 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 570 transitions. [2022-02-16 13:58:56,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 570 transitions. [2022-02-16 13:58:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:56,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:56,004 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:56,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:56,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,567 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:56,222 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:56,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2038542706, now seen corresponding path program 567 times [2022-02-16 13:58:56,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:56,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636122074] [2022-02-16 13:58:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:56,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:56,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:56,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636122074] [2022-02-16 13:58:56,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636122074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:56,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798058359] [2022-02-16 13:58:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:58:56,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:56,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:56,299 INFO L229 MonitoredProcess]: Starting monitored process 568 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:56,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Waiting until timeout for monitored process [2022-02-16 13:58:56,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:58:56,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:56,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:58:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:56,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:56,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:56,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:58:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:57,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798058359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:57,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:57,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:58:57,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033190199] [2022-02-16 13:58:57,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:57,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:58:57,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:58:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:58:57,049 INFO L87 Difference]: Start difference. First operand 226 states and 570 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:57,278 INFO L93 Difference]: Finished difference Result 314 states and 735 transitions. [2022-02-16 13:58:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:57,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:57,279 INFO L225 Difference]: With dead ends: 314 [2022-02-16 13:58:57,279 INFO L226 Difference]: Without dead ends: 311 [2022-02-16 13:58:57,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:58:57,279 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:57,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 74 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-16 13:58:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 229. [2022-02-16 13:58:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.526315789473684) internal successors, (576), 228 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 576 transitions. [2022-02-16 13:58:57,282 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 576 transitions. Word has length 20 [2022-02-16 13:58:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:57,282 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 576 transitions. [2022-02-16 13:58:57,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 576 transitions. [2022-02-16 13:58:57,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:57,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:57,283 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:57,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Forceful destruction successful, exit code 0 [2022-02-16 13:58:57,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,568 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:57,491 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1830249398, now seen corresponding path program 568 times [2022-02-16 13:58:57,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:57,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543280493] [2022-02-16 13:58:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:57,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:57,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:57,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543280493] [2022-02-16 13:58:57,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543280493] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:57,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641021721] [2022-02-16 13:58:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:58:57,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:57,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:57,581 INFO L229 MonitoredProcess]: Starting monitored process 569 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:57,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Waiting until timeout for monitored process [2022-02-16 13:58:57,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:58:57,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:57,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:58,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:58:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:58,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:58,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:58,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:58:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:58,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641021721] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:58,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:58,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:58:58,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304988578] [2022-02-16 13:58:58,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:58,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:58:58,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:58:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:58:58,366 INFO L87 Difference]: Start difference. First operand 229 states and 576 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:58,648 INFO L93 Difference]: Finished difference Result 327 states and 752 transitions. [2022-02-16 13:58:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:58:58,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:58,648 INFO L225 Difference]: With dead ends: 327 [2022-02-16 13:58:58,648 INFO L226 Difference]: Without dead ends: 325 [2022-02-16 13:58:58,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:58:58,649 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:58,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 73 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-16 13:58:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 232. [2022-02-16 13:58:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5238095238095237) internal successors, (583), 231 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 583 transitions. [2022-02-16 13:58:58,651 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 583 transitions. Word has length 20 [2022-02-16 13:58:58,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:58,651 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 583 transitions. [2022-02-16 13:58:58,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 583 transitions. [2022-02-16 13:58:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:58,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:58,652 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:58,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Ended with exit code 0 [2022-02-16 13:58:58,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2022-02-16 13:58:58,852 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:58:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:58:58,852 INFO L85 PathProgramCache]: Analyzing trace with hash -715151602, now seen corresponding path program 569 times [2022-02-16 13:58:58,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:58:58,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792327259] [2022-02-16 13:58:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:58:58,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:58:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:58:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:58,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:58:58,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792327259] [2022-02-16 13:58:58,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792327259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:58:58,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000599918] [2022-02-16 13:58:58,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:58:58,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:58:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:58:58,933 INFO L229 MonitoredProcess]: Starting monitored process 570 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:58:58,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Waiting until timeout for monitored process [2022-02-16 13:58:59,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:58:59,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:58:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:58:59,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:58:59,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:58:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:59,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:58:59,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:58:59,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:58:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:58:59,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000599918] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:58:59,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:58:59,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:58:59,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306986476] [2022-02-16 13:58:59,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:58:59,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:58:59,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:58:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:58:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:58:59,738 INFO L87 Difference]: Start difference. First operand 232 states and 583 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:58:59,958 INFO L93 Difference]: Finished difference Result 314 states and 738 transitions. [2022-02-16 13:58:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:58:59,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:58:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:58:59,959 INFO L225 Difference]: With dead ends: 314 [2022-02-16 13:58:59,959 INFO L226 Difference]: Without dead ends: 314 [2022-02-16 13:58:59,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:58:59,959 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:58:59,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 68 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:58:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-16 13:58:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 228. [2022-02-16 13:58:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.5286343612334803) internal successors, (574), 227 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 574 transitions. [2022-02-16 13:58:59,962 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 574 transitions. Word has length 20 [2022-02-16 13:58:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:58:59,962 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 574 transitions. [2022-02-16 13:58:59,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:58:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 574 transitions. [2022-02-16 13:58:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:58:59,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:58:59,962 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:58:59,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:00,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,570 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:00,171 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1197260720, now seen corresponding path program 570 times [2022-02-16 13:59:00,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:00,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122693660] [2022-02-16 13:59:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:00,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:00,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:00,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122693660] [2022-02-16 13:59:00,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122693660] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:00,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629484121] [2022-02-16 13:59:00,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:59:00,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:00,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:00,264 INFO L229 MonitoredProcess]: Starting monitored process 571 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:00,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Waiting until timeout for monitored process [2022-02-16 13:59:00,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:59:00,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:00,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:00,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:00,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:00,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:00,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:00,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:59:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:00,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629484121] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:00,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:00,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:59:00,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820951642] [2022-02-16 13:59:00,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:00,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:59:00,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:00,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:59:00,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:59:00,976 INFO L87 Difference]: Start difference. First operand 228 states and 574 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:01,196 INFO L93 Difference]: Finished difference Result 329 states and 756 transitions. [2022-02-16 13:59:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:01,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:01,196 INFO L225 Difference]: With dead ends: 329 [2022-02-16 13:59:01,196 INFO L226 Difference]: Without dead ends: 327 [2022-02-16 13:59:01,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:59:01,197 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:01,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 72 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-16 13:59:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 233. [2022-02-16 13:59:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5258620689655173) internal successors, (586), 232 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 586 transitions. [2022-02-16 13:59:01,199 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 586 transitions. Word has length 20 [2022-02-16 13:59:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:01,199 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 586 transitions. [2022-02-16 13:59:01,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 586 transitions. [2022-02-16 13:59:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:01,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:01,200 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:01,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:01,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,571 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:01,418 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:01,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:01,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1982608780, now seen corresponding path program 571 times [2022-02-16 13:59:01,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:01,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291862060] [2022-02-16 13:59:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:01,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:01,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:01,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291862060] [2022-02-16 13:59:01,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291862060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:01,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501458959] [2022-02-16 13:59:01,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:59:01,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:01,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:01,488 INFO L229 MonitoredProcess]: Starting monitored process 572 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:01,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Waiting until timeout for monitored process [2022-02-16 13:59:01,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:01,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:01,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:01,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:02,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:02,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:02,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:59:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:02,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501458959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:02,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:02,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:59:02,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222070208] [2022-02-16 13:59:02,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:02,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:59:02,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:02,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:59:02,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:59:02,219 INFO L87 Difference]: Start difference. First operand 233 states and 586 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:02,445 INFO L93 Difference]: Finished difference Result 329 states and 758 transitions. [2022-02-16 13:59:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:59:02,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:02,445 INFO L225 Difference]: With dead ends: 329 [2022-02-16 13:59:02,445 INFO L226 Difference]: Without dead ends: 329 [2022-02-16 13:59:02,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:59:02,446 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:02,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 91 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-16 13:59:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 232. [2022-02-16 13:59:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5281385281385282) internal successors, (584), 231 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 584 transitions. [2022-02-16 13:59:02,448 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 584 transitions. Word has length 20 [2022-02-16 13:59:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:02,448 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 584 transitions. [2022-02-16 13:59:02,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 584 transitions. [2022-02-16 13:59:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:02,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:02,449 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:02,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:02,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,572 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:02,649 INFO L402 AbstractCegarLoop]: === Iteration 574 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -499473842, now seen corresponding path program 572 times [2022-02-16 13:59:02,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:02,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494965585] [2022-02-16 13:59:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:02,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:02,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:02,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494965585] [2022-02-16 13:59:02,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494965585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:02,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952935902] [2022-02-16 13:59:02,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:59:02,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:02,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:02,741 INFO L229 MonitoredProcess]: Starting monitored process 573 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:02,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Waiting until timeout for monitored process [2022-02-16 13:59:03,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:03,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:03,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:03,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:03,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:03,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:59:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:03,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952935902] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:03,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:03,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-16 13:59:03,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580664988] [2022-02-16 13:59:03,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:03,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:59:03,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:59:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:59:03,350 INFO L87 Difference]: Start difference. First operand 232 states and 584 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:03,591 INFO L93 Difference]: Finished difference Result 317 states and 744 transitions. [2022-02-16 13:59:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:03,592 INFO L225 Difference]: With dead ends: 317 [2022-02-16 13:59:03,592 INFO L226 Difference]: Without dead ends: 317 [2022-02-16 13:59:03,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:59:03,592 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:03,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 113 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:59:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-16 13:59:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 227. [2022-02-16 13:59:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.5309734513274336) internal successors, (572), 226 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 572 transitions. [2022-02-16 13:59:03,594 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 572 transitions. Word has length 20 [2022-02-16 13:59:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:03,595 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 572 transitions. [2022-02-16 13:59:03,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 572 transitions. [2022-02-16 13:59:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:03,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:03,595 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:03,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Ended with exit code 0 [2022-02-16 13:59:03,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable573,573 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:03,811 INFO L402 AbstractCegarLoop]: === Iteration 575 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:03,811 INFO L85 PathProgramCache]: Analyzing trace with hash 136482630, now seen corresponding path program 573 times [2022-02-16 13:59:03,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:03,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41255424] [2022-02-16 13:59:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:03,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:03,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:03,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41255424] [2022-02-16 13:59:03,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41255424] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:03,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61614734] [2022-02-16 13:59:03,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:59:03,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:03,887 INFO L229 MonitoredProcess]: Starting monitored process 574 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:03,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Waiting until timeout for monitored process [2022-02-16 13:59:04,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:59:04,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:04,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:04,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:04,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:04,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:04,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:04,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:59:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:04,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61614734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:04,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:04,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:59:04,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598510477] [2022-02-16 13:59:04,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:04,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:04,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:04,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:04,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:04,568 INFO L87 Difference]: Start difference. First operand 227 states and 572 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:04,774 INFO L93 Difference]: Finished difference Result 356 states and 799 transitions. [2022-02-16 13:59:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:04,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:04,775 INFO L225 Difference]: With dead ends: 356 [2022-02-16 13:59:04,775 INFO L226 Difference]: Without dead ends: 354 [2022-02-16 13:59:04,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:59:04,775 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:04,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 96 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-02-16 13:59:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 234. [2022-02-16 13:59:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.536480686695279) internal successors, (591), 233 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 591 transitions. [2022-02-16 13:59:04,778 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 591 transitions. Word has length 20 [2022-02-16 13:59:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:04,778 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 591 transitions. [2022-02-16 13:59:04,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 591 transitions. [2022-02-16 13:59:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:04,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:04,778 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:04,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Ended with exit code 0 [2022-02-16 13:59:04,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2022-02-16 13:59:04,979 INFO L402 AbstractCegarLoop]: === Iteration 576 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1251580426, now seen corresponding path program 574 times [2022-02-16 13:59:04,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:04,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433274419] [2022-02-16 13:59:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:04,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:05,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:05,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433274419] [2022-02-16 13:59:05,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433274419] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:05,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149022983] [2022-02-16 13:59:05,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:59:05,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:05,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:05,061 INFO L229 MonitoredProcess]: Starting monitored process 575 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:05,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Waiting until timeout for monitored process [2022-02-16 13:59:05,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:59:05,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:05,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:05,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:05,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:05,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:05,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:05,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:59:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:05,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149022983] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:05,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:05,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:59:05,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923234979] [2022-02-16 13:59:05,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:05,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:59:05,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:59:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:59:05,798 INFO L87 Difference]: Start difference. First operand 234 states and 591 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:06,042 INFO L93 Difference]: Finished difference Result 356 states and 801 transitions. [2022-02-16 13:59:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:59:06,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:06,043 INFO L225 Difference]: With dead ends: 356 [2022-02-16 13:59:06,043 INFO L226 Difference]: Without dead ends: 356 [2022-02-16 13:59:06,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:59:06,043 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:06,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 111 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-16 13:59:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 233. [2022-02-16 13:59:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5344827586206895) internal successors, (588), 232 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 588 transitions. [2022-02-16 13:59:06,047 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 588 transitions. Word has length 20 [2022-02-16 13:59:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:06,047 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 588 transitions. [2022-02-16 13:59:06,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 588 transitions. [2022-02-16 13:59:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:06,047 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:06,047 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:06,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:06,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2022-02-16 13:59:06,267 INFO L402 AbstractCegarLoop]: === Iteration 577 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:06,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1560251932, now seen corresponding path program 575 times [2022-02-16 13:59:06,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:06,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834907803] [2022-02-16 13:59:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:06,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:06,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:06,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834907803] [2022-02-16 13:59:06,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834907803] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:06,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921853793] [2022-02-16 13:59:06,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:59:06,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:06,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:06,335 INFO L229 MonitoredProcess]: Starting monitored process 576 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:06,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Waiting until timeout for monitored process [2022-02-16 13:59:06,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:59:06,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:06,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:06,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:06,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:06,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:06,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:59:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:06,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921853793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:06,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:06,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:59:06,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419721088] [2022-02-16 13:59:06,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:06,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:59:06,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:06,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:59:06,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:59:06,961 INFO L87 Difference]: Start difference. First operand 233 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:07,147 INFO L93 Difference]: Finished difference Result 349 states and 798 transitions. [2022-02-16 13:59:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:07,147 INFO L225 Difference]: With dead ends: 349 [2022-02-16 13:59:07,148 INFO L226 Difference]: Without dead ends: 349 [2022-02-16 13:59:07,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:59:07,148 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:07,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 95 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-16 13:59:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 232. [2022-02-16 13:59:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5324675324675323) internal successors, (585), 231 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 585 transitions. [2022-02-16 13:59:07,151 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 585 transitions. Word has length 20 [2022-02-16 13:59:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:07,151 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 585 transitions. [2022-02-16 13:59:07,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 585 transitions. [2022-02-16 13:59:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:07,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:07,151 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:07,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:07,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2022-02-16 13:59:07,369 INFO L402 AbstractCegarLoop]: === Iteration 578 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash 622286734, now seen corresponding path program 576 times [2022-02-16 13:59:07,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:07,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942037474] [2022-02-16 13:59:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:07,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:07,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:07,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942037474] [2022-02-16 13:59:07,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942037474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:07,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393241692] [2022-02-16 13:59:07,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:59:07,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:07,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:07,435 INFO L229 MonitoredProcess]: Starting monitored process 577 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:07,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Waiting until timeout for monitored process [2022-02-16 13:59:07,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:59:07,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:07,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:07,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:08,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:08,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:59:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:08,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393241692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:08,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:08,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:59:08,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915775764] [2022-02-16 13:59:08,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:08,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:08,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:08,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:08,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:08,111 INFO L87 Difference]: Start difference. First operand 232 states and 585 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:08,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:08,292 INFO L93 Difference]: Finished difference Result 358 states and 804 transitions. [2022-02-16 13:59:08,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:08,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:08,293 INFO L225 Difference]: With dead ends: 358 [2022-02-16 13:59:08,293 INFO L226 Difference]: Without dead ends: 358 [2022-02-16 13:59:08,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:59:08,293 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:08,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 94 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-16 13:59:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 225. [2022-02-16 13:59:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.5267857142857144) internal successors, (566), 224 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 566 transitions. [2022-02-16 13:59:08,297 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 566 transitions. Word has length 20 [2022-02-16 13:59:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:08,297 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 566 transitions. [2022-02-16 13:59:08,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 566 transitions. [2022-02-16 13:59:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:08,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:08,298 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:08,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:08,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,577 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:08,521 INFO L402 AbstractCegarLoop]: === Iteration 579 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash -958929542, now seen corresponding path program 577 times [2022-02-16 13:59:08,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:08,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812295149] [2022-02-16 13:59:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:08,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:08,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:08,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812295149] [2022-02-16 13:59:08,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812295149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:08,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560008626] [2022-02-16 13:59:08,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:59:08,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:08,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:08,583 INFO L229 MonitoredProcess]: Starting monitored process 578 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:08,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Waiting until timeout for monitored process [2022-02-16 13:59:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:09,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:09,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:09,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:09,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:09,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560008626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:09,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:09,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 13:59:09,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871062322] [2022-02-16 13:59:09,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:09,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:59:09,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:59:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:59:09,323 INFO L87 Difference]: Start difference. First operand 225 states and 566 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:09,570 INFO L93 Difference]: Finished difference Result 334 states and 753 transitions. [2022-02-16 13:59:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:09,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:09,571 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:59:09,571 INFO L226 Difference]: Without dead ends: 330 [2022-02-16 13:59:09,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:59:09,571 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:09,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 77 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:09,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-16 13:59:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 228. [2022-02-16 13:59:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.5198237885462555) internal successors, (572), 227 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 572 transitions. [2022-02-16 13:59:09,574 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 572 transitions. Word has length 20 [2022-02-16 13:59:09,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:09,574 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 572 transitions. [2022-02-16 13:59:09,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:09,574 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 572 transitions. [2022-02-16 13:59:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:09,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:09,574 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:09,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:09,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,578 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:09,774 INFO L402 AbstractCegarLoop]: === Iteration 580 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:09,775 INFO L85 PathProgramCache]: Analyzing trace with hash -300352642, now seen corresponding path program 578 times [2022-02-16 13:59:09,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:09,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608440521] [2022-02-16 13:59:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:09,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:09,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:09,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608440521] [2022-02-16 13:59:09,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608440521] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:09,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148429447] [2022-02-16 13:59:09,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:59:09,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:09,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:09,846 INFO L229 MonitoredProcess]: Starting monitored process 579 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:09,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Waiting until timeout for monitored process [2022-02-16 13:59:10,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:10,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:10,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:10,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:10,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:10,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:10,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:10,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:10,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148429447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:10,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:10,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:59:10,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312965879] [2022-02-16 13:59:10,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:10,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:10,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:10,576 INFO L87 Difference]: Start difference. First operand 228 states and 572 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:10,883 INFO L93 Difference]: Finished difference Result 334 states and 754 transitions. [2022-02-16 13:59:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:10,884 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:59:10,884 INFO L226 Difference]: Without dead ends: 331 [2022-02-16 13:59:10,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:59:10,884 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:10,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 99 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-16 13:59:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 229. [2022-02-16 13:59:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.517543859649123) internal successors, (574), 228 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 574 transitions. [2022-02-16 13:59:10,887 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 574 transitions. Word has length 20 [2022-02-16 13:59:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:10,887 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 574 transitions. [2022-02-16 13:59:10,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 574 transitions. [2022-02-16 13:59:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:10,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:10,887 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:10,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:11,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2022-02-16 13:59:11,098 INFO L402 AbstractCegarLoop]: === Iteration 581 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:11,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash -92059334, now seen corresponding path program 579 times [2022-02-16 13:59:11,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:11,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965006576] [2022-02-16 13:59:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:11,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:11,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:11,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965006576] [2022-02-16 13:59:11,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965006576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:11,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226187815] [2022-02-16 13:59:11,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:59:11,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:11,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:11,145 INFO L229 MonitoredProcess]: Starting monitored process 580 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:11,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Waiting until timeout for monitored process [2022-02-16 13:59:11,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:59:11,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:11,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:11,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:11,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:59:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:11,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:11,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:11,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:11,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226187815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:11,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:11,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:59:11,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140723193] [2022-02-16 13:59:11,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:11,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:11,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:11,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:11,750 INFO L87 Difference]: Start difference. First operand 229 states and 574 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:12,082 INFO L93 Difference]: Finished difference Result 347 states and 771 transitions. [2022-02-16 13:59:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:59:12,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:12,083 INFO L225 Difference]: With dead ends: 347 [2022-02-16 13:59:12,083 INFO L226 Difference]: Without dead ends: 345 [2022-02-16 13:59:12,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-02-16 13:59:12,083 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:12,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 111 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-16 13:59:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 232. [2022-02-16 13:59:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.515151515151515) internal successors, (581), 231 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 581 transitions. [2022-02-16 13:59:12,086 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 581 transitions. Word has length 20 [2022-02-16 13:59:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:12,087 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 581 transitions. [2022-02-16 13:59:12,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 581 transitions. [2022-02-16 13:59:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:12,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:12,087 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:12,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:12,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,580 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:12,309 INFO L402 AbstractCegarLoop]: === Iteration 582 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1023038462, now seen corresponding path program 580 times [2022-02-16 13:59:12,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:12,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158563365] [2022-02-16 13:59:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:12,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:12,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:12,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158563365] [2022-02-16 13:59:12,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158563365] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:12,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885290093] [2022-02-16 13:59:12,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:59:12,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:12,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:12,358 INFO L229 MonitoredProcess]: Starting monitored process 581 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:12,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Waiting until timeout for monitored process [2022-02-16 13:59:12,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:59:12,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:12,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:12,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:59:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:12,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:12,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:12,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:12,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885290093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:12,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:12,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-16 13:59:12,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254647038] [2022-02-16 13:59:12,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:12,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-16 13:59:12,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-16 13:59:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:59:12,957 INFO L87 Difference]: Start difference. First operand 232 states and 581 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:13,147 INFO L93 Difference]: Finished difference Result 334 states and 757 transitions. [2022-02-16 13:59:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:13,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:13,148 INFO L225 Difference]: With dead ends: 334 [2022-02-16 13:59:13,148 INFO L226 Difference]: Without dead ends: 334 [2022-02-16 13:59:13,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:59:13,148 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:13,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 82 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-16 13:59:13,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 227. [2022-02-16 13:59:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.52212389380531) internal successors, (570), 226 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 570 transitions. [2022-02-16 13:59:13,151 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 570 transitions. Word has length 20 [2022-02-16 13:59:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:13,151 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 570 transitions. [2022-02-16 13:59:13,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 570 transitions. [2022-02-16 13:59:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:13,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:13,152 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:13,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:13,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,581 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:13,367 INFO L402 AbstractCegarLoop]: === Iteration 583 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash -724663878, now seen corresponding path program 581 times [2022-02-16 13:59:13,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:13,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377818848] [2022-02-16 13:59:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:13,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:13,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:13,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377818848] [2022-02-16 13:59:13,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377818848] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:13,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941742288] [2022-02-16 13:59:13,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:59:13,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:13,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:13,411 INFO L229 MonitoredProcess]: Starting monitored process 582 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:13,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Waiting until timeout for monitored process [2022-02-16 13:59:13,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:13,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:13,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:13,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:13,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:13,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:13,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:13,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:14,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941742288] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:14,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:14,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:59:14,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795821514] [2022-02-16 13:59:14,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:14,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:59:14,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:14,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:59:14,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:59:14,068 INFO L87 Difference]: Start difference. First operand 227 states and 570 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:14,265 INFO L93 Difference]: Finished difference Result 307 states and 713 transitions. [2022-02-16 13:59:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:14,266 INFO L225 Difference]: With dead ends: 307 [2022-02-16 13:59:14,266 INFO L226 Difference]: Without dead ends: 304 [2022-02-16 13:59:14,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:59:14,266 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:14,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 81 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-16 13:59:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 229. [2022-02-16 13:59:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.517543859649123) internal successors, (574), 228 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 574 transitions. [2022-02-16 13:59:14,268 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 574 transitions. Word has length 20 [2022-02-16 13:59:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:14,269 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 574 transitions. [2022-02-16 13:59:14,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 574 transitions. [2022-02-16 13:59:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:14,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:14,269 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:14,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Ended with exit code 0 [2022-02-16 13:59:14,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,582 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:14,483 INFO L402 AbstractCegarLoop]: === Iteration 584 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash -516370570, now seen corresponding path program 582 times [2022-02-16 13:59:14,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:14,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437219873] [2022-02-16 13:59:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:14,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:14,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:14,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437219873] [2022-02-16 13:59:14,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437219873] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:14,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197137423] [2022-02-16 13:59:14,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:59:14,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:14,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:14,542 INFO L229 MonitoredProcess]: Starting monitored process 583 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:14,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Waiting until timeout for monitored process [2022-02-16 13:59:14,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:59:14,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:14,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:15,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-02-16 13:59:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:15,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:15,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:15,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:15,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197137423] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:15,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:15,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:59:15,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360690299] [2022-02-16 13:59:15,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:15,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:15,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:15,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:15,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:15,222 INFO L87 Difference]: Start difference. First operand 229 states and 574 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:15,405 INFO L93 Difference]: Finished difference Result 320 states and 730 transitions. [2022-02-16 13:59:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:59:15,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:15,406 INFO L225 Difference]: With dead ends: 320 [2022-02-16 13:59:15,406 INFO L226 Difference]: Without dead ends: 318 [2022-02-16 13:59:15,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:59:15,406 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:15,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 85 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-16 13:59:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 232. [2022-02-16 13:59:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.515151515151515) internal successors, (581), 231 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 581 transitions. [2022-02-16 13:59:15,409 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 581 transitions. Word has length 20 [2022-02-16 13:59:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:15,409 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 581 transitions. [2022-02-16 13:59:15,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 581 transitions. [2022-02-16 13:59:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:15,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:15,410 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:15,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Ended with exit code 0 [2022-02-16 13:59:15,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2022-02-16 13:59:15,623 INFO L402 AbstractCegarLoop]: === Iteration 585 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash 598727226, now seen corresponding path program 583 times [2022-02-16 13:59:15,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:15,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716109999] [2022-02-16 13:59:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:15,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:15,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:15,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716109999] [2022-02-16 13:59:15,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716109999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:15,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814619692] [2022-02-16 13:59:15,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:59:15,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:15,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:15,672 INFO L229 MonitoredProcess]: Starting monitored process 584 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:15,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Waiting until timeout for monitored process [2022-02-16 13:59:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:16,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:16,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:59:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:16,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:16,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:16,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:16,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814619692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:16,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:16,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:59:16,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178366027] [2022-02-16 13:59:16,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:16,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:16,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:16,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:16,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:16,425 INFO L87 Difference]: Start difference. First operand 232 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:16,646 INFO L93 Difference]: Finished difference Result 307 states and 716 transitions. [2022-02-16 13:59:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:16,647 INFO L225 Difference]: With dead ends: 307 [2022-02-16 13:59:16,647 INFO L226 Difference]: Without dead ends: 307 [2022-02-16 13:59:16,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:59:16,647 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:16,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 89 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-16 13:59:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 228. [2022-02-16 13:59:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.5198237885462555) internal successors, (572), 227 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 572 transitions. [2022-02-16 13:59:16,650 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 572 transitions. Word has length 20 [2022-02-16 13:59:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:16,650 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 572 transitions. [2022-02-16 13:59:16,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 572 transitions. [2022-02-16 13:59:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:16,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:16,650 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:16,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Ended with exit code 0 [2022-02-16 13:59:16,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2022-02-16 13:59:16,868 INFO L402 AbstractCegarLoop]: === Iteration 586 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:16,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1783827748, now seen corresponding path program 584 times [2022-02-16 13:59:16,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:16,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003479288] [2022-02-16 13:59:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:16,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:16,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:16,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003479288] [2022-02-16 13:59:16,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003479288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:16,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666625113] [2022-02-16 13:59:16,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:59:16,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:16,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:16,930 INFO L229 MonitoredProcess]: Starting monitored process 585 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:16,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Waiting until timeout for monitored process [2022-02-16 13:59:17,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:17,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:17,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:17,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:17,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:17,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:59:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:17,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666625113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:17,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:17,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:59:17,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244446211] [2022-02-16 13:59:17,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:17,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:17,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:17,525 INFO L87 Difference]: Start difference. First operand 228 states and 572 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:17,668 INFO L93 Difference]: Finished difference Result 322 states and 734 transitions. [2022-02-16 13:59:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:17,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:17,669 INFO L225 Difference]: With dead ends: 322 [2022-02-16 13:59:17,669 INFO L226 Difference]: Without dead ends: 320 [2022-02-16 13:59:17,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:59:17,669 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:17,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 82 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-16 13:59:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 233. [2022-02-16 13:59:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5172413793103448) internal successors, (584), 232 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 584 transitions. [2022-02-16 13:59:17,672 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 584 transitions. Word has length 20 [2022-02-16 13:59:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:17,672 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 584 transitions. [2022-02-16 13:59:17,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:17,672 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 584 transitions. [2022-02-16 13:59:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:17,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:17,672 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:17,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:17,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2022-02-16 13:59:17,889 INFO L402 AbstractCegarLoop]: === Iteration 587 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash -668729952, now seen corresponding path program 585 times [2022-02-16 13:59:17,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:17,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678214274] [2022-02-16 13:59:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:17,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:17,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:17,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678214274] [2022-02-16 13:59:17,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678214274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:17,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680356512] [2022-02-16 13:59:17,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:59:17,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:17,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:17,944 INFO L229 MonitoredProcess]: Starting monitored process 586 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:17,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Waiting until timeout for monitored process [2022-02-16 13:59:18,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:59:18,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:18,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:18,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:18,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:18,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:18,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:18,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:59:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:18,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680356512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:18,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:18,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:59:18,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910224121] [2022-02-16 13:59:18,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:18,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:18,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:18,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:18,632 INFO L87 Difference]: Start difference. First operand 233 states and 584 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:18,904 INFO L93 Difference]: Finished difference Result 322 states and 736 transitions. [2022-02-16 13:59:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:59:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:18,905 INFO L225 Difference]: With dead ends: 322 [2022-02-16 13:59:18,905 INFO L226 Difference]: Without dead ends: 322 [2022-02-16 13:59:18,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:59:18,905 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:18,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 94 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-16 13:59:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 232. [2022-02-16 13:59:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5194805194805197) internal successors, (582), 231 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 582 transitions. [2022-02-16 13:59:18,908 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 582 transitions. Word has length 20 [2022-02-16 13:59:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:18,908 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 582 transitions. [2022-02-16 13:59:18,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 582 transitions. [2022-02-16 13:59:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:18,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:18,909 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:18,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:19,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2022-02-16 13:59:19,109 INFO L402 AbstractCegarLoop]: === Iteration 588 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:19,109 INFO L85 PathProgramCache]: Analyzing trace with hash 814404986, now seen corresponding path program 586 times [2022-02-16 13:59:19,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:19,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874951028] [2022-02-16 13:59:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:19,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:19,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:19,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874951028] [2022-02-16 13:59:19,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874951028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:19,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831061965] [2022-02-16 13:59:19,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:59:19,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:19,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:19,181 INFO L229 MonitoredProcess]: Starting monitored process 587 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:19,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Waiting until timeout for monitored process [2022-02-16 13:59:19,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:59:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:19,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:19,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:19,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:19,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:59:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:19,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831061965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:19,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:19,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:59:19,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288526448] [2022-02-16 13:59:19,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:19,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:19,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:19,747 INFO L87 Difference]: Start difference. First operand 232 states and 582 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:19,955 INFO L93 Difference]: Finished difference Result 310 states and 722 transitions. [2022-02-16 13:59:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:19,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:19,956 INFO L225 Difference]: With dead ends: 310 [2022-02-16 13:59:19,956 INFO L226 Difference]: Without dead ends: 310 [2022-02-16 13:59:19,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:59:19,956 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:19,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 62 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-16 13:59:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 226. [2022-02-16 13:59:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.5244444444444443) internal successors, (568), 225 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 568 transitions. [2022-02-16 13:59:19,959 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 568 transitions. Word has length 20 [2022-02-16 13:59:19,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:19,959 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 568 transitions. [2022-02-16 13:59:19,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 568 transitions. [2022-02-16 13:59:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:19,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:19,960 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:19,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:20,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2022-02-16 13:59:20,167 INFO L402 AbstractCegarLoop]: === Iteration 589 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:20,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:20,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1262156734, now seen corresponding path program 587 times [2022-02-16 13:59:20,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:20,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818474349] [2022-02-16 13:59:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:20,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:20,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:20,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818474349] [2022-02-16 13:59:20,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818474349] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:20,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311644031] [2022-02-16 13:59:20,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:59:20,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:20,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:20,233 INFO L229 MonitoredProcess]: Starting monitored process 588 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:20,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Waiting until timeout for monitored process [2022-02-16 13:59:20,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:20,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:20,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:20,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:20,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:20,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:20,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311644031] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:20,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:20,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:59:20,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809303172] [2022-02-16 13:59:20,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:20,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:59:20,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:59:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:59:20,929 INFO L87 Difference]: Start difference. First operand 226 states and 568 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:21,157 INFO L93 Difference]: Finished difference Result 300 states and 699 transitions. [2022-02-16 13:59:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:21,158 INFO L225 Difference]: With dead ends: 300 [2022-02-16 13:59:21,158 INFO L226 Difference]: Without dead ends: 297 [2022-02-16 13:59:21,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:59:21,158 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:21,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 82 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-16 13:59:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 229. [2022-02-16 13:59:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.517543859649123) internal successors, (574), 228 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 574 transitions. [2022-02-16 13:59:21,161 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 574 transitions. Word has length 20 [2022-02-16 13:59:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:21,161 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 574 transitions. [2022-02-16 13:59:21,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 574 transitions. [2022-02-16 13:59:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:21,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:21,161 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:21,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:21,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2022-02-16 13:59:21,371 INFO L402 AbstractCegarLoop]: === Iteration 590 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:21,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1053863426, now seen corresponding path program 588 times [2022-02-16 13:59:21,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:21,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471831801] [2022-02-16 13:59:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:21,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:21,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:21,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471831801] [2022-02-16 13:59:21,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471831801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:21,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95490944] [2022-02-16 13:59:21,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:59:21,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:21,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:21,447 INFO L229 MonitoredProcess]: Starting monitored process 589 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:21,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Waiting until timeout for monitored process [2022-02-16 13:59:21,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:59:21,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:21,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:59:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:22,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:22,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:22,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:22,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95490944] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:22,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:22,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:59:22,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110883679] [2022-02-16 13:59:22,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:22,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:22,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:22,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:22,194 INFO L87 Difference]: Start difference. First operand 229 states and 574 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:22,460 INFO L93 Difference]: Finished difference Result 313 states and 716 transitions. [2022-02-16 13:59:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-16 13:59:22,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:22,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:22,461 INFO L225 Difference]: With dead ends: 313 [2022-02-16 13:59:22,461 INFO L226 Difference]: Without dead ends: 311 [2022-02-16 13:59:22,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:59:22,461 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:22,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 90 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-16 13:59:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 232. [2022-02-16 13:59:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.515151515151515) internal successors, (581), 231 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 581 transitions. [2022-02-16 13:59:22,464 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 581 transitions. Word has length 20 [2022-02-16 13:59:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:22,464 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 581 transitions. [2022-02-16 13:59:22,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 581 transitions. [2022-02-16 13:59:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:22,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:22,464 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:22,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Ended with exit code 0 [2022-02-16 13:59:22,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2022-02-16 13:59:22,671 INFO L402 AbstractCegarLoop]: === Iteration 591 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:22,671 INFO L85 PathProgramCache]: Analyzing trace with hash 61234370, now seen corresponding path program 589 times [2022-02-16 13:59:22,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:22,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039492377] [2022-02-16 13:59:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:22,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:22,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:22,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039492377] [2022-02-16 13:59:22,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039492377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:22,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668198113] [2022-02-16 13:59:22,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:59:22,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:22,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:22,736 INFO L229 MonitoredProcess]: Starting monitored process 590 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:22,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Waiting until timeout for monitored process [2022-02-16 13:59:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:23,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:23,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-02-16 13:59:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:23,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:23,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:23,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-02-16 13:59:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:23,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668198113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:23,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:23,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:59:23,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663735359] [2022-02-16 13:59:23,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:23,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:23,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:23,440 INFO L87 Difference]: Start difference. First operand 232 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:23,586 INFO L93 Difference]: Finished difference Result 300 states and 702 transitions. [2022-02-16 13:59:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:23,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:23,587 INFO L225 Difference]: With dead ends: 300 [2022-02-16 13:59:23,587 INFO L226 Difference]: Without dead ends: 300 [2022-02-16 13:59:23,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:59:23,587 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:23,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 50 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-16 13:59:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 228. [2022-02-16 13:59:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.5198237885462555) internal successors, (572), 227 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 572 transitions. [2022-02-16 13:59:23,590 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 572 transitions. Word has length 20 [2022-02-16 13:59:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:23,590 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 572 transitions. [2022-02-16 13:59:23,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 572 transitions. [2022-02-16 13:59:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:23,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:23,590 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:23,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:23,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2022-02-16 13:59:23,808 INFO L402 AbstractCegarLoop]: === Iteration 592 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1973646692, now seen corresponding path program 590 times [2022-02-16 13:59:23,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:23,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553072573] [2022-02-16 13:59:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:23,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:23,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:23,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553072573] [2022-02-16 13:59:23,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553072573] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:23,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342777728] [2022-02-16 13:59:23,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:59:23,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:23,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:23,862 INFO L229 MonitoredProcess]: Starting monitored process 591 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:23,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Waiting until timeout for monitored process [2022-02-16 13:59:24,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:24,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:24,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:24,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:24,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:24,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:24,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:24,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:59:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:24,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342777728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:24,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:24,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:59:24,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787453632] [2022-02-16 13:59:24,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:24,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:24,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:24,487 INFO L87 Difference]: Start difference. First operand 228 states and 572 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:24,639 INFO L93 Difference]: Finished difference Result 315 states and 720 transitions. [2022-02-16 13:59:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:24,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:24,640 INFO L225 Difference]: With dead ends: 315 [2022-02-16 13:59:24,640 INFO L226 Difference]: Without dead ends: 313 [2022-02-16 13:59:24,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:59:24,640 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:24,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 88 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-16 13:59:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 233. [2022-02-16 13:59:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5172413793103448) internal successors, (584), 232 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 584 transitions. [2022-02-16 13:59:24,643 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 584 transitions. Word has length 20 [2022-02-16 13:59:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:24,643 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 584 transitions. [2022-02-16 13:59:24,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 584 transitions. [2022-02-16 13:59:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:24,643 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:24,643 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:24,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Ended with exit code 0 [2022-02-16 13:59:24,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,591 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:24,859 INFO L402 AbstractCegarLoop]: === Iteration 593 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1206222808, now seen corresponding path program 591 times [2022-02-16 13:59:24,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:24,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215543005] [2022-02-16 13:59:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:24,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:24,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:24,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215543005] [2022-02-16 13:59:24,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215543005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:24,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358487055] [2022-02-16 13:59:24,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:59:24,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:24,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:24,922 INFO L229 MonitoredProcess]: Starting monitored process 592 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:24,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Waiting until timeout for monitored process [2022-02-16 13:59:25,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 13:59:25,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:25,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:25,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:25,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:25,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:59:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:25,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358487055] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:25,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:25,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:59:25,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366474758] [2022-02-16 13:59:25,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:25,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:25,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:25,637 INFO L87 Difference]: Start difference. First operand 233 states and 584 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:25,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:25,921 INFO L93 Difference]: Finished difference Result 315 states and 722 transitions. [2022-02-16 13:59:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:59:25,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:25,922 INFO L225 Difference]: With dead ends: 315 [2022-02-16 13:59:25,922 INFO L226 Difference]: Without dead ends: 315 [2022-02-16 13:59:25,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-02-16 13:59:25,922 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:25,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 103 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-02-16 13:59:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 232. [2022-02-16 13:59:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5194805194805197) internal successors, (582), 231 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 582 transitions. [2022-02-16 13:59:25,925 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 582 transitions. Word has length 20 [2022-02-16 13:59:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:25,925 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 582 transitions. [2022-02-16 13:59:25,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 582 transitions. [2022-02-16 13:59:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:25,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:25,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:25,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Ended with exit code 0 [2022-02-16 13:59:26,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,592 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:26,135 INFO L402 AbstractCegarLoop]: === Iteration 594 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash 276912130, now seen corresponding path program 592 times [2022-02-16 13:59:26,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:26,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862425246] [2022-02-16 13:59:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:26,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:26,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:26,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862425246] [2022-02-16 13:59:26,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862425246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:26,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129589694] [2022-02-16 13:59:26,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:59:26,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:26,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:26,192 INFO L229 MonitoredProcess]: Starting monitored process 593 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:26,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Waiting until timeout for monitored process [2022-02-16 13:59:26,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:59:26,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:26,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:26,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:26,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:26,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:26,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-02-16 13:59:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:26,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129589694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:26,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:26,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-16 13:59:26,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051191004] [2022-02-16 13:59:26,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:26,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:26,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:26,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:26,863 INFO L87 Difference]: Start difference. First operand 232 states and 582 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:27,096 INFO L93 Difference]: Finished difference Result 303 states and 708 transitions. [2022-02-16 13:59:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:27,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:27,097 INFO L225 Difference]: With dead ends: 303 [2022-02-16 13:59:27,097 INFO L226 Difference]: Without dead ends: 303 [2022-02-16 13:59:27,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:59:27,097 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:27,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 78 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-16 13:59:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 227. [2022-02-16 13:59:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.52212389380531) internal successors, (570), 226 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 570 transitions. [2022-02-16 13:59:27,100 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 570 transitions. Word has length 20 [2022-02-16 13:59:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:27,100 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 570 transitions. [2022-02-16 13:59:27,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 570 transitions. [2022-02-16 13:59:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:27,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:27,100 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:27,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:27,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable593 [2022-02-16 13:59:27,301 INFO L402 AbstractCegarLoop]: === Iteration 595 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash 912868602, now seen corresponding path program 593 times [2022-02-16 13:59:27,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:27,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459351695] [2022-02-16 13:59:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:27,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:27,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:27,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459351695] [2022-02-16 13:59:27,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459351695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:27,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878348515] [2022-02-16 13:59:27,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:59:27,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:27,370 INFO L229 MonitoredProcess]: Starting monitored process 594 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:27,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Waiting until timeout for monitored process [2022-02-16 13:59:27,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:59:27,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:27,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:27,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:27,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:27,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:27,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:59:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:28,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878348515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:28,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:28,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-02-16 13:59:28,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095224785] [2022-02-16 13:59:28,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:28,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:59:28,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:59:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:59:28,031 INFO L87 Difference]: Start difference. First operand 227 states and 570 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:28,248 INFO L93 Difference]: Finished difference Result 337 states and 750 transitions. [2022-02-16 13:59:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:28,248 INFO L225 Difference]: With dead ends: 337 [2022-02-16 13:59:28,248 INFO L226 Difference]: Without dead ends: 335 [2022-02-16 13:59:28,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:59:28,249 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 150 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:28,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 96 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-16 13:59:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 234. [2022-02-16 13:59:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.5278969957081543) internal successors, (589), 233 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 589 transitions. [2022-02-16 13:59:28,252 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 589 transitions. Word has length 20 [2022-02-16 13:59:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:28,252 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 589 transitions. [2022-02-16 13:59:28,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 589 transitions. [2022-02-16 13:59:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:28,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:28,252 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:28,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:28,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,594 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:28,463 INFO L402 AbstractCegarLoop]: === Iteration 596 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2027966398, now seen corresponding path program 594 times [2022-02-16 13:59:28,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:28,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189809069] [2022-02-16 13:59:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:28,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:28,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:28,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189809069] [2022-02-16 13:59:28,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189809069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:28,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026704916] [2022-02-16 13:59:28,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:59:28,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:28,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:28,547 INFO L229 MonitoredProcess]: Starting monitored process 595 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:28,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Waiting until timeout for monitored process [2022-02-16 13:59:28,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 13:59:28,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:28,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:28,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:29,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:29,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:29,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:29,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:59:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:29,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026704916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:29,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:29,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:59:29,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625125008] [2022-02-16 13:59:29,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:29,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:29,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:29,205 INFO L87 Difference]: Start difference. First operand 234 states and 589 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:29,466 INFO L93 Difference]: Finished difference Result 337 states and 752 transitions. [2022-02-16 13:59:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-16 13:59:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:29,467 INFO L225 Difference]: With dead ends: 337 [2022-02-16 13:59:29,467 INFO L226 Difference]: Without dead ends: 337 [2022-02-16 13:59:29,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:59:29,467 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:29,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 98 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-02-16 13:59:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 233. [2022-02-16 13:59:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5258620689655173) internal successors, (586), 232 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 586 transitions. [2022-02-16 13:59:29,470 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 586 transitions. Word has length 20 [2022-02-16 13:59:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:29,470 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 586 transitions. [2022-02-16 13:59:29,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 586 transitions. [2022-02-16 13:59:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:29,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:29,471 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:29,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Ended with exit code 0 [2022-02-16 13:59:29,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595,595 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:29,688 INFO L402 AbstractCegarLoop]: === Iteration 597 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash -783865960, now seen corresponding path program 595 times [2022-02-16 13:59:29,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:29,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282697742] [2022-02-16 13:59:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:29,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:29,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:29,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282697742] [2022-02-16 13:59:29,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282697742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:29,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681697345] [2022-02-16 13:59:29,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:59:29,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:29,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:29,769 INFO L229 MonitoredProcess]: Starting monitored process 596 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:29,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Waiting until timeout for monitored process [2022-02-16 13:59:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:30,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:30,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:30,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:30,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:59:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:30,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681697345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:30,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:30,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-16 13:59:30,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887675679] [2022-02-16 13:59:30,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:30,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:30,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:30,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:30,431 INFO L87 Difference]: Start difference. First operand 233 states and 586 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:30,721 INFO L93 Difference]: Finished difference Result 330 states and 749 transitions. [2022-02-16 13:59:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:30,722 INFO L225 Difference]: With dead ends: 330 [2022-02-16 13:59:30,722 INFO L226 Difference]: Without dead ends: 330 [2022-02-16 13:59:30,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:59:30,722 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:30,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 126 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:59:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-16 13:59:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 232. [2022-02-16 13:59:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.5238095238095237) internal successors, (583), 231 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 583 transitions. [2022-02-16 13:59:30,725 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 583 transitions. Word has length 20 [2022-02-16 13:59:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:30,725 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 583 transitions. [2022-02-16 13:59:30,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 583 transitions. [2022-02-16 13:59:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-16 13:59:30,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:30,726 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:30,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Ended with exit code 0 [2022-02-16 13:59:30,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596,596 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:30,935 INFO L402 AbstractCegarLoop]: === Iteration 598 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1398672706, now seen corresponding path program 596 times [2022-02-16 13:59:30,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:30,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300190128] [2022-02-16 13:59:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:30,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:31,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:31,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300190128] [2022-02-16 13:59:31,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300190128] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:31,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080687147] [2022-02-16 13:59:31,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:59:31,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:31,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:31,003 INFO L229 MonitoredProcess]: Starting monitored process 597 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:31,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Waiting until timeout for monitored process [2022-02-16 13:59:31,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:31,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:31,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:31,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:31,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:31,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-16 13:59:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:31,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080687147] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:31,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:31,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-16 13:59:31,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624689683] [2022-02-16 13:59:31,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:31,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:59:31,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:59:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:59:31,589 INFO L87 Difference]: Start difference. First operand 232 states and 583 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:31,783 INFO L93 Difference]: Finished difference Result 339 states and 755 transitions. [2022-02-16 13:59:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-16 13:59:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:31,783 INFO L225 Difference]: With dead ends: 339 [2022-02-16 13:59:31,784 INFO L226 Difference]: Without dead ends: 339 [2022-02-16 13:59:31,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:59:31,801 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:31,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 119 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-16 13:59:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 226. [2022-02-16 13:59:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.5244444444444443) internal successors, (568), 225 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 568 transitions. [2022-02-16 13:59:31,804 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 568 transitions. Word has length 20 [2022-02-16 13:59:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:31,804 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 568 transitions. [2022-02-16 13:59:31,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 568 transitions. [2022-02-16 13:59:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:31,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:31,804 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:31,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:32,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2022-02-16 13:59:32,022 INFO L402 AbstractCegarLoop]: === Iteration 599 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1692520403, now seen corresponding path program 1 times [2022-02-16 13:59:32,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:32,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049681451] [2022-02-16 13:59:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:32,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:59:32,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:32,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049681451] [2022-02-16 13:59:32,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049681451] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:32,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873952517] [2022-02-16 13:59:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:32,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:32,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:32,122 INFO L229 MonitoredProcess]: Starting monitored process 598 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:32,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Waiting until timeout for monitored process [2022-02-16 13:59:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:32,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:32,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:32,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-02-16 13:59:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:32,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:32,817 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:59:32,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 7 [2022-02-16 13:59:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:32,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873952517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:32,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:32,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-02-16 13:59:32,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438369583] [2022-02-16 13:59:32,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:32,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-16 13:59:32,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:32,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-16 13:59:32,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:59:32,824 INFO L87 Difference]: Start difference. First operand 226 states and 568 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:33,744 INFO L93 Difference]: Finished difference Result 454 states and 994 transitions. [2022-02-16 13:59:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-16 13:59:33,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:33,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:33,745 INFO L225 Difference]: With dead ends: 454 [2022-02-16 13:59:33,745 INFO L226 Difference]: Without dead ends: 415 [2022-02-16 13:59:33,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 13:59:33,745 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:33,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 298 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 13:59:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-02-16 13:59:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 268. [2022-02-16 13:59:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.5093632958801497) internal successors, (670), 267 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 670 transitions. [2022-02-16 13:59:33,753 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 670 transitions. Word has length 21 [2022-02-16 13:59:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:33,753 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 670 transitions. [2022-02-16 13:59:33,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 670 transitions. [2022-02-16 13:59:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:33,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:33,753 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:33,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:33,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 598 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2022-02-16 13:59:33,967 INFO L402 AbstractCegarLoop]: === Iteration 600 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:33,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1585720591, now seen corresponding path program 2 times [2022-02-16 13:59:33,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:33,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222250657] [2022-02-16 13:59:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:33,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:34,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:34,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222250657] [2022-02-16 13:59:34,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222250657] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:34,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163521849] [2022-02-16 13:59:34,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:59:34,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:34,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:34,018 INFO L229 MonitoredProcess]: Starting monitored process 599 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:34,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Waiting until timeout for monitored process [2022-02-16 13:59:34,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:34,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:34,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-02-16 13:59:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:34,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:34,677 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:59:34,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 7 [2022-02-16 13:59:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:34,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163521849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:34,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:34,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-16 13:59:34,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109343980] [2022-02-16 13:59:34,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:34,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:59:34,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:59:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:59:34,683 INFO L87 Difference]: Start difference. First operand 268 states and 670 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:34,808 INFO L93 Difference]: Finished difference Result 459 states and 1073 transitions. [2022-02-16 13:59:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:34,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:34,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:34,809 INFO L225 Difference]: With dead ends: 459 [2022-02-16 13:59:34,809 INFO L226 Difference]: Without dead ends: 440 [2022-02-16 13:59:34,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:34,809 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:34,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 105 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-16 13:59:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 277. [2022-02-16 13:59:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.5434782608695654) internal successors, (702), 276 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 702 transitions. [2022-02-16 13:59:34,812 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 702 transitions. Word has length 21 [2022-02-16 13:59:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:34,812 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 702 transitions. [2022-02-16 13:59:34,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 702 transitions. [2022-02-16 13:59:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:34,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:34,813 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:34,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Ended with exit code 0 [2022-02-16 13:59:35,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2022-02-16 13:59:35,027 INFO L402 AbstractCegarLoop]: === Iteration 601 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:35,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:35,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1506197045, now seen corresponding path program 3 times [2022-02-16 13:59:35,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:35,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858630820] [2022-02-16 13:59:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:35,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:35,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:35,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858630820] [2022-02-16 13:59:35,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858630820] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:35,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519166992] [2022-02-16 13:59:35,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:59:35,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:35,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:35,076 INFO L229 MonitoredProcess]: Starting monitored process 600 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:35,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Waiting until timeout for monitored process [2022-02-16 13:59:35,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:59:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:35,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:35,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 111 [2022-02-16 13:59:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:35,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:35,798 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:59:35,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 7 [2022-02-16 13:59:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:35,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519166992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:35,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:35,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-16 13:59:35,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674436443] [2022-02-16 13:59:35,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:35,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:59:35,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:35,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:59:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:59:35,804 INFO L87 Difference]: Start difference. First operand 277 states and 702 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:36,011 INFO L93 Difference]: Finished difference Result 458 states and 1051 transitions. [2022-02-16 13:59:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:36,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:36,012 INFO L225 Difference]: With dead ends: 458 [2022-02-16 13:59:36,012 INFO L226 Difference]: Without dead ends: 439 [2022-02-16 13:59:36,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:59:36,012 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 122 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:36,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 125 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-02-16 13:59:36,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 284. [2022-02-16 13:59:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.579505300353357) internal successors, (730), 283 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 730 transitions. [2022-02-16 13:59:36,016 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 730 transitions. Word has length 21 [2022-02-16 13:59:36,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:36,016 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 730 transitions. [2022-02-16 13:59:36,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 730 transitions. [2022-02-16 13:59:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:36,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:36,016 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:36,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Ended with exit code 0 [2022-02-16 13:59:36,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2022-02-16 13:59:36,228 INFO L402 AbstractCegarLoop]: === Iteration 602 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2074237395, now seen corresponding path program 4 times [2022-02-16 13:59:36,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:36,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834707268] [2022-02-16 13:59:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:36,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:36,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:36,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834707268] [2022-02-16 13:59:36,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834707268] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:36,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473120164] [2022-02-16 13:59:36,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:59:36,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:36,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:36,288 INFO L229 MonitoredProcess]: Starting monitored process 601 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:36,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Waiting until timeout for monitored process [2022-02-16 13:59:36,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:59:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:36,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:36,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-02-16 13:59:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:36,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:36,988 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:59:36,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 7 [2022-02-16 13:59:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:36,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473120164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:36,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:36,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-16 13:59:36,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476214673] [2022-02-16 13:59:36,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:36,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:59:36,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:59:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:59:36,996 INFO L87 Difference]: Start difference. First operand 284 states and 730 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:37,275 INFO L93 Difference]: Finished difference Result 409 states and 947 transitions. [2022-02-16 13:59:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:37,276 INFO L225 Difference]: With dead ends: 409 [2022-02-16 13:59:37,276 INFO L226 Difference]: Without dead ends: 390 [2022-02-16 13:59:37,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:59:37,276 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:37,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 112 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-16 13:59:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 285. [2022-02-16 13:59:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.563380281690141) internal successors, (728), 284 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 728 transitions. [2022-02-16 13:59:37,279 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 728 transitions. Word has length 21 [2022-02-16 13:59:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:37,279 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 728 transitions. [2022-02-16 13:59:37,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 728 transitions. [2022-02-16 13:59:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:37,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:37,280 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:37,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:37,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2022-02-16 13:59:37,491 INFO L402 AbstractCegarLoop]: === Iteration 603 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash 318263413, now seen corresponding path program 5 times [2022-02-16 13:59:37,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:37,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139851299] [2022-02-16 13:59:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:37,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:37,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:37,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139851299] [2022-02-16 13:59:37,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139851299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:37,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391625981] [2022-02-16 13:59:37,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:59:37,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:37,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:37,532 INFO L229 MonitoredProcess]: Starting monitored process 602 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:37,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Waiting until timeout for monitored process [2022-02-16 13:59:37,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:37,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:38,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-02-16 13:59:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:38,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:38,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:38,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-16 13:59:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:38,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391625981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:38,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:38,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:59:38,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656255245] [2022-02-16 13:59:38,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:38,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:38,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:38,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:38,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:38,229 INFO L87 Difference]: Start difference. First operand 285 states and 728 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:38,380 INFO L93 Difference]: Finished difference Result 433 states and 1034 transitions. [2022-02-16 13:59:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:38,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:38,381 INFO L225 Difference]: With dead ends: 433 [2022-02-16 13:59:38,381 INFO L226 Difference]: Without dead ends: 414 [2022-02-16 13:59:38,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:59:38,381 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:38,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 147 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-02-16 13:59:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 303. [2022-02-16 13:59:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6125827814569536) internal successors, (789), 302 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 789 transitions. [2022-02-16 13:59:38,385 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 789 transitions. Word has length 21 [2022-02-16 13:59:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:38,385 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 789 transitions. [2022-02-16 13:59:38,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 789 transitions. [2022-02-16 13:59:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:38,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:38,385 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:38,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Ended with exit code 0 [2022-02-16 13:59:38,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,602 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:38,598 INFO L402 AbstractCegarLoop]: === Iteration 604 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 238739867, now seen corresponding path program 6 times [2022-02-16 13:59:38,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:38,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436282354] [2022-02-16 13:59:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:38,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:38,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:38,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436282354] [2022-02-16 13:59:38,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436282354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:38,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569159105] [2022-02-16 13:59:38,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:59:38,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:38,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:38,646 INFO L229 MonitoredProcess]: Starting monitored process 603 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:38,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Waiting until timeout for monitored process [2022-02-16 13:59:39,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:59:39,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:39,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:39,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-02-16 13:59:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:39,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:39,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:39,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-16 13:59:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:39,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569159105] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:39,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:39,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:59:39,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606152669] [2022-02-16 13:59:39,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:39,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:39,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:39,518 INFO L87 Difference]: Start difference. First operand 303 states and 789 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:39,694 INFO L93 Difference]: Finished difference Result 515 states and 1217 transitions. [2022-02-16 13:59:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:39,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:39,695 INFO L225 Difference]: With dead ends: 515 [2022-02-16 13:59:39,695 INFO L226 Difference]: Without dead ends: 496 [2022-02-16 13:59:39,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:59:39,695 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:39,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 164 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-16 13:59:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 310. [2022-02-16 13:59:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.644012944983819) internal successors, (817), 309 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 817 transitions. [2022-02-16 13:59:39,699 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 817 transitions. Word has length 21 [2022-02-16 13:59:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:39,699 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 817 transitions. [2022-02-16 13:59:39,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 817 transitions. [2022-02-16 13:59:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:39,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:39,699 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:39,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:39,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,603 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:39,911 INFO L402 AbstractCegarLoop]: === Iteration 605 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 953272723, now seen corresponding path program 7 times [2022-02-16 13:59:39,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:39,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190865814] [2022-02-16 13:59:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:39,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:39,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:39,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190865814] [2022-02-16 13:59:39,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190865814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:39,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606096812] [2022-02-16 13:59:39,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:59:39,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:39,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:39,962 INFO L229 MonitoredProcess]: Starting monitored process 604 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:39,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Waiting until timeout for monitored process [2022-02-16 13:59:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:40,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:40,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 111 [2022-02-16 13:59:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:40,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:40,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:40,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-16 13:59:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:40,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606096812] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:40,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:40,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:59:40,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499858630] [2022-02-16 13:59:40,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:40,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:40,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:40,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:40,767 INFO L87 Difference]: Start difference. First operand 310 states and 817 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:41,033 INFO L93 Difference]: Finished difference Result 466 states and 1113 transitions. [2022-02-16 13:59:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:41,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:41,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:41,034 INFO L225 Difference]: With dead ends: 466 [2022-02-16 13:59:41,034 INFO L226 Difference]: Without dead ends: 447 [2022-02-16 13:59:41,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:59:41,034 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 115 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:41,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 150 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-16 13:59:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 294. [2022-02-16 13:59:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.583617747440273) internal successors, (757), 293 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 757 transitions. [2022-02-16 13:59:41,038 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 757 transitions. Word has length 21 [2022-02-16 13:59:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:41,038 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 757 transitions. [2022-02-16 13:59:41,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 757 transitions. [2022-02-16 13:59:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:41,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:41,038 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:41,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:41,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,604 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:41,248 INFO L402 AbstractCegarLoop]: === Iteration 606 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:41,249 INFO L85 PathProgramCache]: Analyzing trace with hash -647058413, now seen corresponding path program 8 times [2022-02-16 13:59:41,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:41,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604585197] [2022-02-16 13:59:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:41,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:41,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:41,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604585197] [2022-02-16 13:59:41,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604585197] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:41,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021791729] [2022-02-16 13:59:41,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:59:41,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:41,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:41,317 INFO L229 MonitoredProcess]: Starting monitored process 605 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:41,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Waiting until timeout for monitored process [2022-02-16 13:59:41,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:41,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:41,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:41,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2022-02-16 13:59:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:41,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:42,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:42,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 130 [2022-02-16 13:59:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:42,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021791729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:42,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:42,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:59:42,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667496056] [2022-02-16 13:59:42,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:42,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:42,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:42,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:42,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:42,257 INFO L87 Difference]: Start difference. First operand 294 states and 757 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:42,497 INFO L93 Difference]: Finished difference Result 422 states and 1006 transitions. [2022-02-16 13:59:42,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:42,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:42,498 INFO L225 Difference]: With dead ends: 422 [2022-02-16 13:59:42,498 INFO L226 Difference]: Without dead ends: 388 [2022-02-16 13:59:42,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:59:42,498 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 154 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:42,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 95 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-16 13:59:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 306. [2022-02-16 13:59:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6295081967213116) internal successors, (802), 305 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 802 transitions. [2022-02-16 13:59:42,502 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 802 transitions. Word has length 21 [2022-02-16 13:59:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:42,502 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 802 transitions. [2022-02-16 13:59:42,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 802 transitions. [2022-02-16 13:59:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:42,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:42,502 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:42,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:42,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable605 [2022-02-16 13:59:42,717 INFO L402 AbstractCegarLoop]: === Iteration 607 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 67474443, now seen corresponding path program 9 times [2022-02-16 13:59:42,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:42,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701902468] [2022-02-16 13:59:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:42,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:42,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:42,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701902468] [2022-02-16 13:59:42,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701902468] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:42,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651230599] [2022-02-16 13:59:42,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:59:42,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:42,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:42,786 INFO L229 MonitoredProcess]: Starting monitored process 606 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:42,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Waiting until timeout for monitored process [2022-02-16 13:59:43,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:59:43,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:43,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:43,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:43,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-02-16 13:59:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:43,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:43,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:43,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-02-16 13:59:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:43,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651230599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:43,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:43,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:59:43,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197253640] [2022-02-16 13:59:43,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:43,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:43,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:43,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:43,662 INFO L87 Difference]: Start difference. First operand 306 states and 802 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:44,105 INFO L93 Difference]: Finished difference Result 424 states and 1000 transitions. [2022-02-16 13:59:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:44,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:44,105 INFO L225 Difference]: With dead ends: 424 [2022-02-16 13:59:44,105 INFO L226 Difference]: Without dead ends: 405 [2022-02-16 13:59:44,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:59:44,106 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:44,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 146 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:59:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-02-16 13:59:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 299. [2022-02-16 13:59:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.597315436241611) internal successors, (774), 298 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 774 transitions. [2022-02-16 13:59:44,109 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 774 transitions. Word has length 21 [2022-02-16 13:59:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:44,109 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 774 transitions. [2022-02-16 13:59:44,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 774 transitions. [2022-02-16 13:59:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:44,110 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:44,110 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:44,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Ended with exit code 0 [2022-02-16 13:59:44,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,606 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:44,310 INFO L402 AbstractCegarLoop]: === Iteration 608 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash 655219765, now seen corresponding path program 10 times [2022-02-16 13:59:44,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:44,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146942920] [2022-02-16 13:59:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:44,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:44,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:44,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146942920] [2022-02-16 13:59:44,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146942920] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:44,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978736175] [2022-02-16 13:59:44,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:59:44,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:44,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:44,380 INFO L229 MonitoredProcess]: Starting monitored process 607 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:44,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Waiting until timeout for monitored process [2022-02-16 13:59:44,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:59:44,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:45,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-16 13:59:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:45,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:45,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:45,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-02-16 13:59:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:45,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978736175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:45,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:45,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:59:45,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352745736] [2022-02-16 13:59:45,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:45,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:45,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:45,406 INFO L87 Difference]: Start difference. First operand 299 states and 774 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:45,677 INFO L93 Difference]: Finished difference Result 346 states and 847 transitions. [2022-02-16 13:59:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:45,677 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:45,678 INFO L225 Difference]: With dead ends: 346 [2022-02-16 13:59:45,678 INFO L226 Difference]: Without dead ends: 323 [2022-02-16 13:59:45,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:59:45,678 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:45,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 102 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:59:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-16 13:59:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 298. [2022-02-16 13:59:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.589225589225589) internal successors, (769), 297 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 769 transitions. [2022-02-16 13:59:45,681 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 769 transitions. Word has length 21 [2022-02-16 13:59:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:45,681 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 769 transitions. [2022-02-16 13:59:45,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 769 transitions. [2022-02-16 13:59:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:45,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:45,682 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:45,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:45,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,607 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:45,882 INFO L402 AbstractCegarLoop]: === Iteration 609 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash -530359059, now seen corresponding path program 11 times [2022-02-16 13:59:45,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:45,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818120175] [2022-02-16 13:59:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:45,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:45,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:45,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818120175] [2022-02-16 13:59:45,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818120175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:45,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037203557] [2022-02-16 13:59:45,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:59:45,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:45,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:45,937 INFO L229 MonitoredProcess]: Starting monitored process 608 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:45,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Waiting until timeout for monitored process [2022-02-16 13:59:46,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:46,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:46,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:46,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:46,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-02-16 13:59:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:46,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:46,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:46,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-16 13:59:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:46,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037203557] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:46,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:46,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-16 13:59:46,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130950104] [2022-02-16 13:59:46,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:46,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-16 13:59:46,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-16 13:59:46,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-16 13:59:46,644 INFO L87 Difference]: Start difference. First operand 298 states and 769 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:46,846 INFO L93 Difference]: Finished difference Result 482 states and 1085 transitions. [2022-02-16 13:59:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:46,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:46,847 INFO L225 Difference]: With dead ends: 482 [2022-02-16 13:59:46,847 INFO L226 Difference]: Without dead ends: 463 [2022-02-16 13:59:46,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:46,847 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:46,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 160 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:59:46,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-02-16 13:59:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 299. [2022-02-16 13:59:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.530201342281879) internal successors, (754), 298 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 754 transitions. [2022-02-16 13:59:46,852 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 754 transitions. Word has length 21 [2022-02-16 13:59:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:46,852 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 754 transitions. [2022-02-16 13:59:46,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 754 transitions. [2022-02-16 13:59:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:46,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:46,852 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:46,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:47,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable608 [2022-02-16 13:59:47,059 INFO L402 AbstractCegarLoop]: === Iteration 610 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:47,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:47,059 INFO L85 PathProgramCache]: Analyzing trace with hash -609882605, now seen corresponding path program 12 times [2022-02-16 13:59:47,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:47,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984742937] [2022-02-16 13:59:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:47,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:47,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:47,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984742937] [2022-02-16 13:59:47,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984742937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:47,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133852021] [2022-02-16 13:59:47,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:59:47,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:47,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:47,123 INFO L229 MonitoredProcess]: Starting monitored process 609 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:47,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Waiting until timeout for monitored process [2022-02-16 13:59:47,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:59:47,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:47,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:47,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:47,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-02-16 13:59:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:47,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:47,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:47,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-16 13:59:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:48,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133852021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:48,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:48,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-16 13:59:48,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340569114] [2022-02-16 13:59:48,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:48,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:59:48,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:48,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:59:48,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:59:48,021 INFO L87 Difference]: Start difference. First operand 299 states and 754 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:48,230 INFO L93 Difference]: Finished difference Result 564 states and 1268 transitions. [2022-02-16 13:59:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:48,231 INFO L225 Difference]: With dead ends: 564 [2022-02-16 13:59:48,231 INFO L226 Difference]: Without dead ends: 545 [2022-02-16 13:59:48,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-02-16 13:59:48,231 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:48,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 141 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-02-16 13:59:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 306. [2022-02-16 13:59:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.5639344262295083) internal successors, (782), 305 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 782 transitions. [2022-02-16 13:59:48,235 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 782 transitions. Word has length 21 [2022-02-16 13:59:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:48,235 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 782 transitions. [2022-02-16 13:59:48,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 782 transitions. [2022-02-16 13:59:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:48,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:48,236 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:48,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:48,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,609 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:48,447 INFO L402 AbstractCegarLoop]: === Iteration 611 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 104650251, now seen corresponding path program 13 times [2022-02-16 13:59:48,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:48,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416112313] [2022-02-16 13:59:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:48,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:48,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:48,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416112313] [2022-02-16 13:59:48,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416112313] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:48,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575273950] [2022-02-16 13:59:48,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:59:48,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:48,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:48,499 INFO L229 MonitoredProcess]: Starting monitored process 610 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:48,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Waiting until timeout for monitored process [2022-02-16 13:59:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:48,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:48,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 111 [2022-02-16 13:59:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:49,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:49,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:49,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-16 13:59:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:49,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575273950] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:49,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:49,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-16 13:59:49,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891134208] [2022-02-16 13:59:49,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:49,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-16 13:59:49,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-16 13:59:49,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-02-16 13:59:49,322 INFO L87 Difference]: Start difference. First operand 306 states and 782 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:49,656 INFO L93 Difference]: Finished difference Result 515 states and 1164 transitions. [2022-02-16 13:59:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:49,657 INFO L225 Difference]: With dead ends: 515 [2022-02-16 13:59:49,657 INFO L226 Difference]: Without dead ends: 496 [2022-02-16 13:59:49,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:59:49,657 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:49,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 149 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:59:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-16 13:59:49,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 289. [2022-02-16 13:59:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.4930555555555554) internal successors, (718), 288 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 718 transitions. [2022-02-16 13:59:49,661 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 718 transitions. Word has length 21 [2022-02-16 13:59:49,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:49,661 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 718 transitions. [2022-02-16 13:59:49,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 718 transitions. [2022-02-16 13:59:49,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:49,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:49,661 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:49,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:49,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 610 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2022-02-16 13:59:49,871 INFO L402 AbstractCegarLoop]: === Iteration 612 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:49,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:49,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1495680885, now seen corresponding path program 14 times [2022-02-16 13:59:49,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:49,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810364486] [2022-02-16 13:59:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:49,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:49,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:49,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810364486] [2022-02-16 13:59:49,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810364486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:49,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019531386] [2022-02-16 13:59:49,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:59:49,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:49,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:49,939 INFO L229 MonitoredProcess]: Starting monitored process 611 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:49,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Waiting until timeout for monitored process [2022-02-16 13:59:50,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:50,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:50,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:50,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2022-02-16 13:59:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:50,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:50,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:50,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-02-16 13:59:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:50,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019531386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:50,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:50,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:59:50,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936014321] [2022-02-16 13:59:50,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:50,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:50,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:50,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:50,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:50,806 INFO L87 Difference]: Start difference. First operand 289 states and 718 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:51,073 INFO L93 Difference]: Finished difference Result 455 states and 1030 transitions. [2022-02-16 13:59:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:51,074 INFO L225 Difference]: With dead ends: 455 [2022-02-16 13:59:51,074 INFO L226 Difference]: Without dead ends: 436 [2022-02-16 13:59:51,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-16 13:59:51,074 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 132 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:51,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 109 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-02-16 13:59:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 301. [2022-02-16 13:59:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.5433333333333334) internal successors, (763), 300 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 763 transitions. [2022-02-16 13:59:51,077 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 763 transitions. Word has length 21 [2022-02-16 13:59:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:51,078 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 763 transitions. [2022-02-16 13:59:51,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 763 transitions. [2022-02-16 13:59:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:51,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:51,078 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:51,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:51,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,611 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:51,283 INFO L402 AbstractCegarLoop]: === Iteration 613 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash -781148029, now seen corresponding path program 15 times [2022-02-16 13:59:51,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:51,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569998615] [2022-02-16 13:59:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:51,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:51,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:51,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569998615] [2022-02-16 13:59:51,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569998615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:51,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442129317] [2022-02-16 13:59:51,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 13:59:51,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:51,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:51,344 INFO L229 MonitoredProcess]: Starting monitored process 612 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:51,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Waiting until timeout for monitored process [2022-02-16 13:59:51,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 13:59:51,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:51,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 48 [2022-02-16 13:59:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:51,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:52,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:52,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 130 [2022-02-16 13:59:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:52,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442129317] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:52,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:52,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:59:52,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39260253] [2022-02-16 13:59:52,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:52,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:52,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:52,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:52,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:52,277 INFO L87 Difference]: Start difference. First operand 301 states and 763 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:52,729 INFO L93 Difference]: Finished difference Result 472 states and 1047 transitions. [2022-02-16 13:59:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:52,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:52,730 INFO L225 Difference]: With dead ends: 472 [2022-02-16 13:59:52,730 INFO L226 Difference]: Without dead ends: 453 [2022-02-16 13:59:52,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-16 13:59:52,731 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 138 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:52,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 200 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:59:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-02-16 13:59:52,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 294. [2022-02-16 13:59:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.508532423208191) internal successors, (735), 293 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 735 transitions. [2022-02-16 13:59:52,736 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 735 transitions. Word has length 21 [2022-02-16 13:59:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:52,736 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 735 transitions. [2022-02-16 13:59:52,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 735 transitions. [2022-02-16 13:59:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:52,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:52,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:52,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:52,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2022-02-16 13:59:52,951 INFO L402 AbstractCegarLoop]: === Iteration 614 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash -193402707, now seen corresponding path program 16 times [2022-02-16 13:59:52,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:52,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462531625] [2022-02-16 13:59:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:52,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:53,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:53,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462531625] [2022-02-16 13:59:53,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462531625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:53,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070923890] [2022-02-16 13:59:53,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 13:59:53,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:53,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:53,021 INFO L229 MonitoredProcess]: Starting monitored process 613 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:53,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Waiting until timeout for monitored process [2022-02-16 13:59:53,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 13:59:53,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:53,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:53,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-16 13:59:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:53,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:53,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 13:59:53,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-02-16 13:59:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:53,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070923890] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:53,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:53,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-16 13:59:53,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512793484] [2022-02-16 13:59:53,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:53,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-16 13:59:53,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:53,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-16 13:59:53,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-16 13:59:53,986 INFO L87 Difference]: Start difference. First operand 294 states and 735 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:54,283 INFO L93 Difference]: Finished difference Result 394 states and 894 transitions. [2022-02-16 13:59:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:54,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:54,284 INFO L225 Difference]: With dead ends: 394 [2022-02-16 13:59:54,284 INFO L226 Difference]: Without dead ends: 371 [2022-02-16 13:59:54,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-16 13:59:54,284 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 90 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:54,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 142 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 13:59:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-02-16 13:59:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 281. [2022-02-16 13:59:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.475) internal successors, (693), 280 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 693 transitions. [2022-02-16 13:59:54,287 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 693 transitions. Word has length 21 [2022-02-16 13:59:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:54,287 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 693 transitions. [2022-02-16 13:59:54,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 693 transitions. [2022-02-16 13:59:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:54,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:54,287 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:54,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Ended with exit code 0 [2022-02-16 13:59:54,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2022-02-16 13:59:54,497 INFO L402 AbstractCegarLoop]: === Iteration 615 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:54,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 686857781, now seen corresponding path program 17 times [2022-02-16 13:59:54,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:54,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456126837] [2022-02-16 13:59:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:54,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:54,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:54,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456126837] [2022-02-16 13:59:54,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456126837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:54,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119125125] [2022-02-16 13:59:54,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 13:59:54,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:54,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:54,583 INFO L229 MonitoredProcess]: Starting monitored process 614 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:54,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Waiting until timeout for monitored process [2022-02-16 13:59:54,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 13:59:54,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 13:59:54,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:55,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-02-16 13:59:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:55,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:55,429 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:59:55,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 125 [2022-02-16 13:59:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:55,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119125125] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:55,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:55,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-16 13:59:55,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466191924] [2022-02-16 13:59:55,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:55,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:55,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:55,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:55,485 INFO L87 Difference]: Start difference. First operand 281 states and 693 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:55,776 INFO L93 Difference]: Finished difference Result 490 states and 1088 transitions. [2022-02-16 13:59:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:55,776 INFO L225 Difference]: With dead ends: 490 [2022-02-16 13:59:55,776 INFO L226 Difference]: Without dead ends: 471 [2022-02-16 13:59:55,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:59:55,777 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 136 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:55,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 143 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:55,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-02-16 13:59:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 298. [2022-02-16 13:59:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.542087542087542) internal successors, (755), 297 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 755 transitions. [2022-02-16 13:59:55,780 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 755 transitions. Word has length 21 [2022-02-16 13:59:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:55,780 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 755 transitions. [2022-02-16 13:59:55,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 755 transitions. [2022-02-16 13:59:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:55,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:55,781 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:55,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:55,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,614 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:55,998 INFO L402 AbstractCegarLoop]: === Iteration 616 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1401390637, now seen corresponding path program 18 times [2022-02-16 13:59:55,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:55,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255484160] [2022-02-16 13:59:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:55,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:56,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:56,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255484160] [2022-02-16 13:59:56,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255484160] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:56,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493623053] [2022-02-16 13:59:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 13:59:56,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:56,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:56,067 INFO L229 MonitoredProcess]: Starting monitored process 615 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:56,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Waiting until timeout for monitored process [2022-02-16 13:59:56,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 13:59:56,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:56,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:56,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:56,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2022-02-16 13:59:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:56,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:56,936 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:59:56,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 125 [2022-02-16 13:59:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:57,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493623053] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:57,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:57,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-16 13:59:57,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994157243] [2022-02-16 13:59:57,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:57,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:57,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:57,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:57,006 INFO L87 Difference]: Start difference. First operand 298 states and 755 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:57,332 INFO L93 Difference]: Finished difference Result 507 states and 1105 transitions. [2022-02-16 13:59:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-16 13:59:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:57,333 INFO L225 Difference]: With dead ends: 507 [2022-02-16 13:59:57,333 INFO L226 Difference]: Without dead ends: 488 [2022-02-16 13:59:57,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-02-16 13:59:57,333 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 233 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:57,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 129 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-02-16 13:59:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 291. [2022-02-16 13:59:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.5068965517241377) internal successors, (727), 290 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 727 transitions. [2022-02-16 13:59:57,337 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 727 transitions. Word has length 21 [2022-02-16 13:59:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:57,337 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 727 transitions. [2022-02-16 13:59:57,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 727 transitions. [2022-02-16 13:59:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:57,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:57,337 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:57,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:57,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2022-02-16 13:59:57,550 INFO L402 AbstractCegarLoop]: === Iteration 617 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:57,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1989135959, now seen corresponding path program 19 times [2022-02-16 13:59:57,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:57,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777093596] [2022-02-16 13:59:57,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:57,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:57,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:57,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777093596] [2022-02-16 13:59:57,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777093596] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:57,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963595328] [2022-02-16 13:59:57,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 13:59:57,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:57,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:57,594 INFO L229 MonitoredProcess]: Starting monitored process 616 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:57,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Waiting until timeout for monitored process [2022-02-16 13:59:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:57,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:57,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:58,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-16 13:59:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:58,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:58,391 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:59:58,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 95 [2022-02-16 13:59:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:58,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963595328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 13:59:58,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 13:59:58,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-16 13:59:58,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585697886] [2022-02-16 13:59:58,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 13:59:58,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 13:59:58,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:59:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 13:59:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-16 13:59:58,458 INFO L87 Difference]: Start difference. First operand 291 states and 727 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:59:58,824 INFO L93 Difference]: Finished difference Result 447 states and 991 transitions. [2022-02-16 13:59:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 13:59:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 13:59:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:59:58,824 INFO L225 Difference]: With dead ends: 447 [2022-02-16 13:59:58,824 INFO L226 Difference]: Without dead ends: 424 [2022-02-16 13:59:58,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-02-16 13:59:58,825 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 156 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 13:59:58,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 115 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 13:59:58,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-02-16 13:59:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 286. [2022-02-16 13:59:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.491228070175439) internal successors, (710), 285 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 710 transitions. [2022-02-16 13:59:58,828 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 710 transitions. Word has length 21 [2022-02-16 13:59:58,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:59:58,828 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 710 transitions. [2022-02-16 13:59:58,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 13:59:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 710 transitions. [2022-02-16 13:59:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 13:59:58,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:59:58,829 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 13:59:58,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Forceful destruction successful, exit code 0 [2022-02-16 13:59:59,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,616 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:59,043 INFO L402 AbstractCegarLoop]: === Iteration 618 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 13:59:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:59:59,043 INFO L85 PathProgramCache]: Analyzing trace with hash 660438539, now seen corresponding path program 20 times [2022-02-16 13:59:59,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:59:59,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621730792] [2022-02-16 13:59:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:59:59,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:59:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:59:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:59,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:59:59,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621730792] [2022-02-16 13:59:59,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621730792] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 13:59:59,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146217101] [2022-02-16 13:59:59,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 13:59:59,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 13:59:59,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:59:59,101 INFO L229 MonitoredProcess]: Starting monitored process 617 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 13:59:59,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Waiting until timeout for monitored process [2022-02-16 13:59:59,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 13:59:59,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 13:59:59,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-16 13:59:59,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 13:59:59,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-16 13:59:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:59:59,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 13:59:59,911 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 13:59:59,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 125 [2022-02-16 14:00:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:00:00,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146217101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:00,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:00,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-16 14:00:00,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892387905] [2022-02-16 14:00:00,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:00,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-16 14:00:00,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-16 14:00:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-16 14:00:00,002 INFO L87 Difference]: Start difference. First operand 286 states and 710 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:00,368 INFO L93 Difference]: Finished difference Result 424 states and 935 transitions. [2022-02-16 14:00:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-16 14:00:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:00,369 INFO L225 Difference]: With dead ends: 424 [2022-02-16 14:00:00,369 INFO L226 Difference]: Without dead ends: 397 [2022-02-16 14:00:00,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:00:00,369 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 151 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:00,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 136 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:00:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-02-16 14:00:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 287. [2022-02-16 14:00:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.4755244755244754) internal successors, (708), 286 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 708 transitions. [2022-02-16 14:00:00,372 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 708 transitions. Word has length 21 [2022-02-16 14:00:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:00,373 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 708 transitions. [2022-02-16 14:00:00,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 708 transitions. [2022-02-16 14:00:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:00,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:00,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:00,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Ended with exit code 0 [2022-02-16 14:00:00,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable617 [2022-02-16 14:00:00,587 INFO L402 AbstractCegarLoop]: === Iteration 619 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:00,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:00,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1023953232, now seen corresponding path program 597 times [2022-02-16 14:00:00,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:00,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783883125] [2022-02-16 14:00:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:00,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:00,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:00,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783883125] [2022-02-16 14:00:00,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783883125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:00,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397494196] [2022-02-16 14:00:00,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:00:00,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:00,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:00,681 INFO L229 MonitoredProcess]: Starting monitored process 618 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:00,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Waiting until timeout for monitored process [2022-02-16 14:00:01,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 14:00:01,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:00:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:01,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 115 [2022-02-16 14:00:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:01,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:01,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:01,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 114 [2022-02-16 14:00:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:02,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397494196] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:02,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:02,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-16 14:00:02,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842100081] [2022-02-16 14:00:02,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:02,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:00:02,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:02,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:00:02,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:00:02,058 INFO L87 Difference]: Start difference. First operand 287 states and 708 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:02,630 INFO L93 Difference]: Finished difference Result 589 states and 1420 transitions. [2022-02-16 14:00:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-16 14:00:02,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:02,631 INFO L225 Difference]: With dead ends: 589 [2022-02-16 14:00:02,631 INFO L226 Difference]: Without dead ends: 575 [2022-02-16 14:00:02,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:00:02,632 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:02,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 164 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 890 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-02-16 14:00:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-16 14:00:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 311. [2022-02-16 14:00:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.4838709677419355) internal successors, (770), 310 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 770 transitions. [2022-02-16 14:00:02,636 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 770 transitions. Word has length 21 [2022-02-16 14:00:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:02,636 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 770 transitions. [2022-02-16 14:00:02,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 770 transitions. [2022-02-16 14:00:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:02,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:02,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:02,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:02,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,618 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:02,854 INFO L402 AbstractCegarLoop]: === Iteration 620 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1738805676, now seen corresponding path program 598 times [2022-02-16 14:00:02,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:02,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315720145] [2022-02-16 14:00:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:02,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:03,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:03,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315720145] [2022-02-16 14:00:03,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315720145] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:03,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203015396] [2022-02-16 14:00:03,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:00:03,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:03,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:03,038 INFO L229 MonitoredProcess]: Starting monitored process 619 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:03,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Waiting until timeout for monitored process [2022-02-16 14:00:03,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:00:03,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:03,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:00:03,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:03,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:03,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-02-16 14:00:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:04,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:04,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:04,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 84 [2022-02-16 14:00:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:04,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203015396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:04,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:04,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-16 14:00:04,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793328433] [2022-02-16 14:00:04,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:04,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:00:04,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:04,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:00:04,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:00:04,479 INFO L87 Difference]: Start difference. First operand 311 states and 770 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:05,101 INFO L93 Difference]: Finished difference Result 533 states and 1328 transitions. [2022-02-16 14:00:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:00:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:05,102 INFO L225 Difference]: With dead ends: 533 [2022-02-16 14:00:05,102 INFO L226 Difference]: Without dead ends: 519 [2022-02-16 14:00:05,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-02-16 14:00:05,102 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:05,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 208 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1182 Invalid, 0 Unknown, 255 Unchecked, 0.4s Time] [2022-02-16 14:00:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-02-16 14:00:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 325. [2022-02-16 14:00:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.509259259259259) internal successors, (813), 324 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 813 transitions. [2022-02-16 14:00:05,107 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 813 transitions. Word has length 21 [2022-02-16 14:00:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:05,107 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 813 transitions. [2022-02-16 14:00:05,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 813 transitions. [2022-02-16 14:00:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:05,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:05,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:05,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Ended with exit code 0 [2022-02-16 14:00:05,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,619 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:05,323 INFO L402 AbstractCegarLoop]: === Iteration 621 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash 862567696, now seen corresponding path program 599 times [2022-02-16 14:00:05,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:05,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966005323] [2022-02-16 14:00:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:05,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:05,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:05,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966005323] [2022-02-16 14:00:05,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966005323] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:05,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106729965] [2022-02-16 14:00:05,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:00:05,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:05,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:05,452 INFO L229 MonitoredProcess]: Starting monitored process 620 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:05,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Waiting until timeout for monitored process [2022-02-16 14:00:05,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:00:05,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:05,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:00:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:06,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2022-02-16 14:00:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:06,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:07,122 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-16 14:00:07,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 119 [2022-02-16 14:00:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:07,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106729965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:07,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:07,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-02-16 14:00:07,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304094340] [2022-02-16 14:00:07,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:07,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:00:07,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:00:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:00:07,198 INFO L87 Difference]: Start difference. First operand 325 states and 813 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:08,296 INFO L93 Difference]: Finished difference Result 636 states and 1472 transitions. [2022-02-16 14:00:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-16 14:00:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:08,297 INFO L225 Difference]: With dead ends: 636 [2022-02-16 14:00:08,297 INFO L226 Difference]: Without dead ends: 606 [2022-02-16 14:00:08,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:00:08,298 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 211 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:08,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 182 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:00:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-02-16 14:00:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 336. [2022-02-16 14:00:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.546268656716418) internal successors, (853), 335 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 853 transitions. [2022-02-16 14:00:08,302 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 853 transitions. Word has length 21 [2022-02-16 14:00:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:08,302 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 853 transitions. [2022-02-16 14:00:08,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 853 transitions. [2022-02-16 14:00:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:08,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:08,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:08,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:08,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 620 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2022-02-16 14:00:08,512 INFO L402 AbstractCegarLoop]: === Iteration 622 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:08,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:08,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1480010352, now seen corresponding path program 600 times [2022-02-16 14:00:08,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:08,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851342864] [2022-02-16 14:00:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:08,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:08,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:08,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851342864] [2022-02-16 14:00:08,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851342864] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:08,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420034173] [2022-02-16 14:00:08,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:00:08,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:08,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:08,645 INFO L229 MonitoredProcess]: Starting monitored process 621 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:08,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Waiting until timeout for monitored process [2022-02-16 14:00:09,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 14:00:09,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:09,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:00:09,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:09,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:09,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2022-02-16 14:00:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:09,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:10,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:10,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 114 [2022-02-16 14:00:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:10,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420034173] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:10,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:10,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-02-16 14:00:10,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952047561] [2022-02-16 14:00:10,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:10,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:00:10,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:10,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:00:10,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:00:10,568 INFO L87 Difference]: Start difference. First operand 336 states and 853 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:11,421 INFO L93 Difference]: Finished difference Result 562 states and 1346 transitions. [2022-02-16 14:00:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 14:00:11,421 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:11,422 INFO L225 Difference]: With dead ends: 562 [2022-02-16 14:00:11,422 INFO L226 Difference]: Without dead ends: 528 [2022-02-16 14:00:11,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 14:00:11,422 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 138 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:11,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 221 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 940 Invalid, 0 Unknown, 218 Unchecked, 0.4s Time] [2022-02-16 14:00:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-02-16 14:00:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 355. [2022-02-16 14:00:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.573446327683616) internal successors, (911), 354 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 911 transitions. [2022-02-16 14:00:11,427 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 911 transitions. Word has length 21 [2022-02-16 14:00:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:11,427 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 911 transitions. [2022-02-16 14:00:11,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 911 transitions. [2022-02-16 14:00:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:11,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:11,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:11,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:11,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,621 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:11,646 INFO L402 AbstractCegarLoop]: === Iteration 623 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash -831604562, now seen corresponding path program 601 times [2022-02-16 14:00:11,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:11,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230218814] [2022-02-16 14:00:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:11,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:11,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:11,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230218814] [2022-02-16 14:00:11,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230218814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:11,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172168825] [2022-02-16 14:00:11,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:00:11,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:11,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:11,852 INFO L229 MonitoredProcess]: Starting monitored process 622 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:11,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Waiting until timeout for monitored process [2022-02-16 14:00:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:12,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:00:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:13,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2022-02-16 14:00:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:13,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:13,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:13,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 114 [2022-02-16 14:00:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:14,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172168825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:14,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:14,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-02-16 14:00:14,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424295305] [2022-02-16 14:00:14,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:14,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:00:14,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:00:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:00:14,139 INFO L87 Difference]: Start difference. First operand 355 states and 911 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:15,592 INFO L93 Difference]: Finished difference Result 543 states and 1254 transitions. [2022-02-16 14:00:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:00:15,593 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:15,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:15,594 INFO L225 Difference]: With dead ends: 543 [2022-02-16 14:00:15,594 INFO L226 Difference]: Without dead ends: 532 [2022-02-16 14:00:15,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:00:15,594 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 209 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:15,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 234 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 811 Invalid, 0 Unknown, 358 Unchecked, 0.4s Time] [2022-02-16 14:00:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-02-16 14:00:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 358. [2022-02-16 14:00:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.5798319327731094) internal successors, (921), 357 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:15,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 921 transitions. [2022-02-16 14:00:15,600 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 921 transitions. Word has length 21 [2022-02-16 14:00:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:15,600 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 921 transitions. [2022-02-16 14:00:15,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 921 transitions. [2022-02-16 14:00:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:15,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:15,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:15,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:15,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2022-02-16 14:00:15,811 INFO L402 AbstractCegarLoop]: === Iteration 624 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash -117071706, now seen corresponding path program 602 times [2022-02-16 14:00:15,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:15,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526688260] [2022-02-16 14:00:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:15,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:15,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:15,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526688260] [2022-02-16 14:00:15,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526688260] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:15,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705906087] [2022-02-16 14:00:15,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:00:15,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:15,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:15,982 INFO L229 MonitoredProcess]: Starting monitored process 623 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:15,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Waiting until timeout for monitored process [2022-02-16 14:00:16,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:00:16,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:16,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-16 14:00:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:16,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 119 [2022-02-16 14:00:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:16,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:17,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:17,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 137 [2022-02-16 14:00:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:17,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705906087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:17,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:17,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-16 14:00:17,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794710362] [2022-02-16 14:00:17,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:17,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:00:17,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:17,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:00:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:00:17,378 INFO L87 Difference]: Start difference. First operand 358 states and 921 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:18,617 INFO L93 Difference]: Finished difference Result 662 states and 1628 transitions. [2022-02-16 14:00:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-16 14:00:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:18,619 INFO L225 Difference]: With dead ends: 662 [2022-02-16 14:00:18,619 INFO L226 Difference]: Without dead ends: 634 [2022-02-16 14:00:18,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2022-02-16 14:00:18,619 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 201 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:18,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 209 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:00:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-02-16 14:00:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 352. [2022-02-16 14:00:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.6153846153846154) internal successors, (918), 351 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 918 transitions. [2022-02-16 14:00:18,623 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 918 transitions. Word has length 21 [2022-02-16 14:00:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:18,624 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 918 transitions. [2022-02-16 14:00:18,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 918 transitions. [2022-02-16 14:00:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:18,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:18,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:18,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:18,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2022-02-16 14:00:18,842 INFO L402 AbstractCegarLoop]: === Iteration 625 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1121363020, now seen corresponding path program 603 times [2022-02-16 14:00:18,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:18,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699485965] [2022-02-16 14:00:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:18,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:18,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:18,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699485965] [2022-02-16 14:00:18,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699485965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:18,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632606735] [2022-02-16 14:00:18,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:00:18,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:18,974 INFO L229 MonitoredProcess]: Starting monitored process 624 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:18,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (624)] Waiting until timeout for monitored process [2022-02-16 14:00:19,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-16 14:00:19,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:19,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:00:19,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:19,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:19,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-02-16 14:00:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:19,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:20,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:20,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 90 [2022-02-16 14:00:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:20,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632606735] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:20,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:20,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 14:00:20,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824773880] [2022-02-16 14:00:20,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:20,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:00:20,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:20,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:00:20,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:00:20,483 INFO L87 Difference]: Start difference. First operand 352 states and 918 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:20,942 INFO L93 Difference]: Finished difference Result 528 states and 1315 transitions. [2022-02-16 14:00:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-16 14:00:20,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:20,944 INFO L225 Difference]: With dead ends: 528 [2022-02-16 14:00:20,944 INFO L226 Difference]: Without dead ends: 514 [2022-02-16 14:00:20,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-16 14:00:20,944 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:20,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 133 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 585 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-02-16 14:00:20,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-16 14:00:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 361. [2022-02-16 14:00:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.6555555555555554) internal successors, (956), 360 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 956 transitions. [2022-02-16 14:00:20,948 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 956 transitions. Word has length 21 [2022-02-16 14:00:20,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:20,948 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 956 transitions. [2022-02-16 14:00:20,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 956 transitions. [2022-02-16 14:00:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:20,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:20,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:20,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (624)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:21,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,624 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:21,149 INFO L402 AbstractCegarLoop]: === Iteration 626 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1011479024, now seen corresponding path program 604 times [2022-02-16 14:00:21,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:21,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104016009] [2022-02-16 14:00:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:21,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:21,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:21,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104016009] [2022-02-16 14:00:21,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104016009] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:21,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089895499] [2022-02-16 14:00:21,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:00:21,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:21,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:21,308 INFO L229 MonitoredProcess]: Starting monitored process 625 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:21,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (625)] Waiting until timeout for monitored process [2022-02-16 14:00:21,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:00:21,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:00:21,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:22,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 135 [2022-02-16 14:00:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:22,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:22,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:22,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 144 [2022-02-16 14:00:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:23,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089895499] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:23,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:23,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-02-16 14:00:23,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776701723] [2022-02-16 14:00:23,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:23,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:00:23,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:23,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:00:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:00:23,181 INFO L87 Difference]: Start difference. First operand 361 states and 956 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:24,534 INFO L93 Difference]: Finished difference Result 694 states and 1637 transitions. [2022-02-16 14:00:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 14:00:24,534 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:24,535 INFO L225 Difference]: With dead ends: 694 [2022-02-16 14:00:24,535 INFO L226 Difference]: Without dead ends: 655 [2022-02-16 14:00:24,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2022-02-16 14:00:24,535 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 272 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:24,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 281 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1253 Invalid, 0 Unknown, 378 Unchecked, 0.5s Time] [2022-02-16 14:00:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-02-16 14:00:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 371. [2022-02-16 14:00:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.708108108108108) internal successors, (1002), 370 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1002 transitions. [2022-02-16 14:00:24,540 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1002 transitions. Word has length 21 [2022-02-16 14:00:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:24,541 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1002 transitions. [2022-02-16 14:00:24,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1002 transitions. [2022-02-16 14:00:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:24,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:24,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:24,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (625)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:24,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2022-02-16 14:00:24,751 INFO L402 AbstractCegarLoop]: === Iteration 627 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1521255476, now seen corresponding path program 605 times [2022-02-16 14:00:24,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:24,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450132166] [2022-02-16 14:00:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:24,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:24,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:24,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450132166] [2022-02-16 14:00:24,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450132166] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:24,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297330350] [2022-02-16 14:00:24,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:00:24,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:24,936 INFO L229 MonitoredProcess]: Starting monitored process 626 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:24,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (626)] Waiting until timeout for monitored process [2022-02-16 14:00:25,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:00:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:25,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-16 14:00:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:25,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 148 [2022-02-16 14:00:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:26,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:26,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:26,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 137 [2022-02-16 14:00:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:26,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297330350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:26,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:26,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-16 14:00:26,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577952156] [2022-02-16 14:00:26,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:26,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-16 14:00:26,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:26,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-16 14:00:26,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-02-16 14:00:26,942 INFO L87 Difference]: Start difference. First operand 371 states and 1002 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:28,226 INFO L93 Difference]: Finished difference Result 727 states and 1732 transitions. [2022-02-16 14:00:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:00:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:28,228 INFO L225 Difference]: With dead ends: 727 [2022-02-16 14:00:28,228 INFO L226 Difference]: Without dead ends: 680 [2022-02-16 14:00:28,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:00:28,228 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 163 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:28,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 220 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 923 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2022-02-16 14:00:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-02-16 14:00:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 387. [2022-02-16 14:00:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.7512953367875648) internal successors, (1062), 386 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1062 transitions. [2022-02-16 14:00:28,233 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1062 transitions. Word has length 21 [2022-02-16 14:00:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:28,233 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1062 transitions. [2022-02-16 14:00:28,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1062 transitions. [2022-02-16 14:00:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:28,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:28,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:28,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (626)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:28,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,626 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:28,444 INFO L402 AbstractCegarLoop]: === Iteration 628 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2027970030, now seen corresponding path program 606 times [2022-02-16 14:00:28,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:28,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474605900] [2022-02-16 14:00:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:28,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:28,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:28,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474605900] [2022-02-16 14:00:28,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474605900] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:28,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288153991] [2022-02-16 14:00:28,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:00:28,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:28,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:28,672 INFO L229 MonitoredProcess]: Starting monitored process 627 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:28,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (627)] Waiting until timeout for monitored process [2022-02-16 14:00:29,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-16 14:00:29,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:29,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:00:29,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:29,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 107 [2022-02-16 14:00:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:29,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:30,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:30,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 114 [2022-02-16 14:00:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:30,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288153991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:30,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:30,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-16 14:00:30,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627917867] [2022-02-16 14:00:30,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:30,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:00:30,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:30,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:00:30,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:00:30,783 INFO L87 Difference]: Start difference. First operand 387 states and 1062 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:32,645 INFO L93 Difference]: Finished difference Result 653 states and 1611 transitions. [2022-02-16 14:00:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:00:32,645 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:32,646 INFO L225 Difference]: With dead ends: 653 [2022-02-16 14:00:32,646 INFO L226 Difference]: Without dead ends: 647 [2022-02-16 14:00:32,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=233, Invalid=2023, Unknown=0, NotChecked=0, Total=2256 [2022-02-16 14:00:32,647 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 168 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:32,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 249 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:00:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-02-16 14:00:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 390. [2022-02-16 14:00:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.7506426735218508) internal successors, (1070), 389 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1070 transitions. [2022-02-16 14:00:32,652 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1070 transitions. Word has length 21 [2022-02-16 14:00:32,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:32,652 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1070 transitions. [2022-02-16 14:00:32,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1070 transitions. [2022-02-16 14:00:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:32,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:32,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:32,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (627)] Ended with exit code 0 [2022-02-16 14:00:32,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2022-02-16 14:00:32,863 INFO L402 AbstractCegarLoop]: === Iteration 629 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:32,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:32,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1552464410, now seen corresponding path program 607 times [2022-02-16 14:00:32,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:32,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497977670] [2022-02-16 14:00:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:32,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:33,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:33,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497977670] [2022-02-16 14:00:33,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497977670] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:33,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938132332] [2022-02-16 14:00:33,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:00:33,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:33,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:33,082 INFO L229 MonitoredProcess]: Starting monitored process 628 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:33,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (628)] Waiting until timeout for monitored process [2022-02-16 14:00:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:00:33,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:34,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:34,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 105 [2022-02-16 14:00:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:34,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:35,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:35,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 114 [2022-02-16 14:00:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:35,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938132332] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:35,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:35,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-02-16 14:00:35,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627420959] [2022-02-16 14:00:35,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:35,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:00:35,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:35,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:00:35,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:00:35,566 INFO L87 Difference]: Start difference. First operand 390 states and 1070 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:36,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:36,705 INFO L93 Difference]: Finished difference Result 594 states and 1511 transitions. [2022-02-16 14:00:36,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-16 14:00:36,705 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:36,706 INFO L225 Difference]: With dead ends: 594 [2022-02-16 14:00:36,706 INFO L226 Difference]: Without dead ends: 588 [2022-02-16 14:00:36,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2022-02-16 14:00:36,707 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:36,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 250 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 862 Invalid, 0 Unknown, 207 Unchecked, 0.4s Time] [2022-02-16 14:00:36,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-16 14:00:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 390. [2022-02-16 14:00:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.7506426735218508) internal successors, (1070), 389 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1070 transitions. [2022-02-16 14:00:36,713 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1070 transitions. Word has length 21 [2022-02-16 14:00:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:36,713 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1070 transitions. [2022-02-16 14:00:36,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1070 transitions. [2022-02-16 14:00:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:36,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:36,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:36,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (628)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:36,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2022-02-16 14:00:36,932 INFO L402 AbstractCegarLoop]: === Iteration 630 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash -933103058, now seen corresponding path program 608 times [2022-02-16 14:00:36,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:36,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208876389] [2022-02-16 14:00:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:36,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:37,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:37,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208876389] [2022-02-16 14:00:37,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208876389] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:37,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160868312] [2022-02-16 14:00:37,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:00:37,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:37,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:37,286 INFO L229 MonitoredProcess]: Starting monitored process 629 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:37,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (629)] Waiting until timeout for monitored process [2022-02-16 14:00:37,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:00:37,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:00:37,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:38,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 135 [2022-02-16 14:00:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:38,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:39,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:39,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 144 [2022-02-16 14:00:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:39,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160868312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:39,867 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:39,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-16 14:00:39,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532088811] [2022-02-16 14:00:39,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:39,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:00:39,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:00:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:00:39,868 INFO L87 Difference]: Start difference. First operand 390 states and 1070 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:42,719 INFO L93 Difference]: Finished difference Result 800 states and 1907 transitions. [2022-02-16 14:00:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-16 14:00:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:42,720 INFO L225 Difference]: With dead ends: 800 [2022-02-16 14:00:42,720 INFO L226 Difference]: Without dead ends: 790 [2022-02-16 14:00:42,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=385, Invalid=3155, Unknown=0, NotChecked=0, Total=3540 [2022-02-16 14:00:42,721 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 307 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:42,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 381 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 14:00:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-02-16 14:00:42,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 394. [2022-02-16 14:00:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.768447837150127) internal successors, (1088), 393 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1088 transitions. [2022-02-16 14:00:42,729 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1088 transitions. Word has length 21 [2022-02-16 14:00:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:42,729 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1088 transitions. [2022-02-16 14:00:42,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1088 transitions. [2022-02-16 14:00:42,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:42,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:42,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:42,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (629)] Ended with exit code 0 [2022-02-16 14:00:42,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,629 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:42,953 INFO L402 AbstractCegarLoop]: === Iteration 631 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:42,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1368982034, now seen corresponding path program 609 times [2022-02-16 14:00:42,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:42,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021107650] [2022-02-16 14:00:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:42,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:43,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:43,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021107650] [2022-02-16 14:00:43,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021107650] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:43,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545125776] [2022-02-16 14:00:43,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:00:43,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:43,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:43,126 INFO L229 MonitoredProcess]: Starting monitored process 630 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:43,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (630)] Waiting until timeout for monitored process [2022-02-16 14:00:43,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:00:43,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:43,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:00:43,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:43,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 129 [2022-02-16 14:00:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:44,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:45,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:45,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 114 [2022-02-16 14:00:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:45,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545125776] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:45,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:45,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-16 14:00:45,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448812945] [2022-02-16 14:00:45,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:45,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:00:45,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:00:45,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:00:45,173 INFO L87 Difference]: Start difference. First operand 394 states and 1088 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:50,994 INFO L93 Difference]: Finished difference Result 1176 states and 2606 transitions. [2022-02-16 14:00:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-16 14:00:50,994 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:50,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:50,996 INFO L225 Difference]: With dead ends: 1176 [2022-02-16 14:00:50,996 INFO L226 Difference]: Without dead ends: 1077 [2022-02-16 14:00:50,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2834 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1025, Invalid=8875, Unknown=0, NotChecked=0, Total=9900 [2022-02-16 14:00:50,998 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 653 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:50,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 588 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 2407 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-16 14:00:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-02-16 14:00:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 418. [2022-02-16 14:00:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.824940047961631) internal successors, (1178), 417 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1178 transitions. [2022-02-16 14:00:51,006 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1178 transitions. Word has length 21 [2022-02-16 14:00:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:51,006 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1178 transitions. [2022-02-16 14:00:51,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1178 transitions. [2022-02-16 14:00:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:51,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:51,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:51,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (630)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:51,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 630 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2022-02-16 14:00:51,219 INFO L402 AbstractCegarLoop]: === Iteration 632 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1429240270, now seen corresponding path program 610 times [2022-02-16 14:00:51,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:51,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122450688] [2022-02-16 14:00:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:51,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:51,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:51,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122450688] [2022-02-16 14:00:51,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122450688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:51,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410311343] [2022-02-16 14:00:51,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:00:51,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:51,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:51,401 INFO L229 MonitoredProcess]: Starting monitored process 631 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:51,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (631)] Waiting until timeout for monitored process [2022-02-16 14:00:51,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:00:51,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:51,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:00:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:52,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:52,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 89 [2022-02-16 14:00:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:52,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:52,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:52,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2022-02-16 14:00:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:53,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410311343] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:53,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:53,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 25 [2022-02-16 14:00:53,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866426211] [2022-02-16 14:00:53,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:53,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-16 14:00:53,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-16 14:00:53,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-16 14:00:53,189 INFO L87 Difference]: Start difference. First operand 418 states and 1178 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:53,996 INFO L93 Difference]: Finished difference Result 629 states and 1627 transitions. [2022-02-16 14:00:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 14:00:53,996 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:53,997 INFO L225 Difference]: With dead ends: 629 [2022-02-16 14:00:53,997 INFO L226 Difference]: Without dead ends: 607 [2022-02-16 14:00:53,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2022-02-16 14:00:53,998 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 169 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:53,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 211 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1099 Invalid, 0 Unknown, 135 Unchecked, 0.4s Time] [2022-02-16 14:00:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-02-16 14:00:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 429. [2022-02-16 14:00:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.8551401869158877) internal successors, (1222), 428 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1222 transitions. [2022-02-16 14:00:54,003 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1222 transitions. Word has length 21 [2022-02-16 14:00:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:54,003 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1222 transitions. [2022-02-16 14:00:54,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1222 transitions. [2022-02-16 14:00:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:54,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:54,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:54,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (631)] Forceful destruction successful, exit code 0 [2022-02-16 14:00:54,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2022-02-16 14:00:54,222 INFO L402 AbstractCegarLoop]: === Iteration 633 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 732884982, now seen corresponding path program 611 times [2022-02-16 14:00:54,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:54,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932871667] [2022-02-16 14:00:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:54,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:54,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:54,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932871667] [2022-02-16 14:00:54,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932871667] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:54,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280089724] [2022-02-16 14:00:54,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:00:54,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:54,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:54,381 INFO L229 MonitoredProcess]: Starting monitored process 632 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:54,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (632)] Waiting until timeout for monitored process [2022-02-16 14:00:54,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:00:54,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:54,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:00:54,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:55,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:00:55,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 124 [2022-02-16 14:00:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:55,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:55,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:55,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 118 [2022-02-16 14:00:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:55,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280089724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:55,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:55,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-16 14:00:55,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795821068] [2022-02-16 14:00:55,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:55,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:00:55,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:55,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:00:55,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:00:55,891 INFO L87 Difference]: Start difference. First operand 429 states and 1222 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:00:56,691 INFO L93 Difference]: Finished difference Result 660 states and 1660 transitions. [2022-02-16 14:00:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-16 14:00:56,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:00:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:00:56,693 INFO L225 Difference]: With dead ends: 660 [2022-02-16 14:00:56,693 INFO L226 Difference]: Without dead ends: 623 [2022-02-16 14:00:56,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:00:56,693 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 139 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:00:56,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 189 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 855 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-02-16 14:00:56,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-16 14:00:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 432. [2022-02-16 14:00:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.8677494199535962) internal successors, (1236), 431 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1236 transitions. [2022-02-16 14:00:56,698 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1236 transitions. Word has length 21 [2022-02-16 14:00:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:00:56,698 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1236 transitions. [2022-02-16 14:00:56,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:00:56,698 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1236 transitions. [2022-02-16 14:00:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:00:56,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:00:56,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:00:56,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (632)] Ended with exit code 0 [2022-02-16 14:00:56,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 632 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2022-02-16 14:00:56,911 INFO L402 AbstractCegarLoop]: === Iteration 634 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:00:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:00:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash 322126902, now seen corresponding path program 612 times [2022-02-16 14:00:56,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:00:56,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275294483] [2022-02-16 14:00:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:00:56,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:00:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:00:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:57,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:00:57,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275294483] [2022-02-16 14:00:57,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275294483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:00:57,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641717084] [2022-02-16 14:00:57,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:00:57,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:00:57,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:00:57,100 INFO L229 MonitoredProcess]: Starting monitored process 633 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:00:57,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (633)] Waiting until timeout for monitored process [2022-02-16 14:00:57,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:00:57,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:00:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-16 14:00:57,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:00:57,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 133 [2022-02-16 14:00:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:58,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:00:58,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:00:58,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 105 [2022-02-16 14:00:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:00:59,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641717084] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:00:59,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:00:59,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-16 14:00:59,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368169600] [2022-02-16 14:00:59,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:00:59,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:00:59,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:00:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:00:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:00:59,011 INFO L87 Difference]: Start difference. First operand 432 states and 1236 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:01,494 INFO L93 Difference]: Finished difference Result 957 states and 2305 transitions. [2022-02-16 14:01:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-16 14:01:01,495 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:01,496 INFO L225 Difference]: With dead ends: 957 [2022-02-16 14:01:01,496 INFO L226 Difference]: Without dead ends: 878 [2022-02-16 14:01:01,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=384, Invalid=2478, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:01:01,497 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 315 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:01,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 423 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 14:01:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-02-16 14:01:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 438. [2022-02-16 14:01:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.9016018306636155) internal successors, (1268), 437 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1268 transitions. [2022-02-16 14:01:01,505 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1268 transitions. Word has length 21 [2022-02-16 14:01:01,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:01,506 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1268 transitions. [2022-02-16 14:01:01,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1268 transitions. [2022-02-16 14:01:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:01,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:01,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:01,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (633)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:01,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,633 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:01,724 INFO L402 AbstractCegarLoop]: === Iteration 635 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:01,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:01,725 INFO L85 PathProgramCache]: Analyzing trace with hash 96418128, now seen corresponding path program 613 times [2022-02-16 14:01:01,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:01,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146831246] [2022-02-16 14:01:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:01,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:01,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:01,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146831246] [2022-02-16 14:01:01,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146831246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:01,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27734115] [2022-02-16 14:01:01,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:01:01,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:01,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:01,846 INFO L229 MonitoredProcess]: Starting monitored process 634 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:01,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (634)] Waiting until timeout for monitored process [2022-02-16 14:01:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:01:02,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:02,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:01:02,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 99 [2022-02-16 14:01:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:02,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:03,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:03,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 112 [2022-02-16 14:01:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:03,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27734115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:03,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:03,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-16 14:01:03,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424687350] [2022-02-16 14:01:03,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:03,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:01:03,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:03,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:01:03,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:01:03,416 INFO L87 Difference]: Start difference. First operand 438 states and 1268 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:04,535 INFO L93 Difference]: Finished difference Result 724 states and 1838 transitions. [2022-02-16 14:01:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-16 14:01:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:04,536 INFO L225 Difference]: With dead ends: 724 [2022-02-16 14:01:04,536 INFO L226 Difference]: Without dead ends: 687 [2022-02-16 14:01:04,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-02-16 14:01:04,537 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:04,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 203 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 944 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-02-16 14:01:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-02-16 14:01:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 444. [2022-02-16 14:01:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.927765237020316) internal successors, (1297), 443 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:04,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1297 transitions. [2022-02-16 14:01:04,542 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1297 transitions. Word has length 21 [2022-02-16 14:01:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:04,543 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 1297 transitions. [2022-02-16 14:01:04,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1297 transitions. [2022-02-16 14:01:04,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:04,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:04,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:04,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (634)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:04,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,634 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:04,755 INFO L402 AbstractCegarLoop]: === Iteration 636 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:04,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1059635244, now seen corresponding path program 614 times [2022-02-16 14:01:04,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:04,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541385348] [2022-02-16 14:01:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:04,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:04,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:04,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541385348] [2022-02-16 14:01:04,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541385348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:04,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191775319] [2022-02-16 14:01:04,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:01:04,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:04,888 INFO L229 MonitoredProcess]: Starting monitored process 635 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:04,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (635)] Waiting until timeout for monitored process [2022-02-16 14:01:05,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:01:05,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-16 14:01:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:05,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:01:05,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 118 [2022-02-16 14:01:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:05,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:06,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:06,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 112 [2022-02-16 14:01:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:06,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191775319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:06,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:06,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-16 14:01:06,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251435800] [2022-02-16 14:01:06,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:06,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:01:06,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:01:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:01:06,434 INFO L87 Difference]: Start difference. First operand 444 states and 1297 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:07,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:07,188 INFO L93 Difference]: Finished difference Result 777 states and 1915 transitions. [2022-02-16 14:01:07,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:01:07,188 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:07,190 INFO L225 Difference]: With dead ends: 777 [2022-02-16 14:01:07,190 INFO L226 Difference]: Without dead ends: 708 [2022-02-16 14:01:07,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:01:07,190 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 150 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:07,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 237 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 805 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-02-16 14:01:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-16 14:01:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 462. [2022-02-16 14:01:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.934924078091106) internal successors, (1353), 461 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1353 transitions. [2022-02-16 14:01:07,196 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1353 transitions. Word has length 21 [2022-02-16 14:01:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:07,196 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1353 transitions. [2022-02-16 14:01:07,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1353 transitions. [2022-02-16 14:01:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:07,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:07,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:07,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (635)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:07,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 635 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2022-02-16 14:01:07,411 INFO L402 AbstractCegarLoop]: === Iteration 637 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:07,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2075757962, now seen corresponding path program 615 times [2022-02-16 14:01:07,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:07,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209923984] [2022-02-16 14:01:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:07,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:07,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:07,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209923984] [2022-02-16 14:01:07,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209923984] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:07,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400810746] [2022-02-16 14:01:07,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:01:07,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:07,544 INFO L229 MonitoredProcess]: Starting monitored process 636 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:07,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (636)] Waiting until timeout for monitored process [2022-02-16 14:01:07,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:01:07,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:07,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:01:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:08,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:01:08,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2022-02-16 14:01:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:08,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:09,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:09,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2022-02-16 14:01:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:09,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400810746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:09,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:09,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-02-16 14:01:09,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075505810] [2022-02-16 14:01:09,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:09,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:01:09,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:01:09,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:01:09,353 INFO L87 Difference]: Start difference. First operand 462 states and 1353 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:10,420 INFO L93 Difference]: Finished difference Result 706 states and 1894 transitions. [2022-02-16 14:01:10,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-16 14:01:10,420 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:10,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:10,422 INFO L225 Difference]: With dead ends: 706 [2022-02-16 14:01:10,422 INFO L226 Difference]: Without dead ends: 695 [2022-02-16 14:01:10,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:01:10,422 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:10,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 340 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1211 Invalid, 0 Unknown, 394 Unchecked, 0.4s Time] [2022-02-16 14:01:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-02-16 14:01:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 464. [2022-02-16 14:01:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.9330453563714904) internal successors, (1358), 463 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1358 transitions. [2022-02-16 14:01:10,428 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1358 transitions. Word has length 21 [2022-02-16 14:01:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:10,428 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1358 transitions. [2022-02-16 14:01:10,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1358 transitions. [2022-02-16 14:01:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:10,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:10,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:10,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (636)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:10,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,636 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:10,647 INFO L402 AbstractCegarLoop]: === Iteration 638 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2026402282, now seen corresponding path program 616 times [2022-02-16 14:01:10,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:10,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623954616] [2022-02-16 14:01:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:10,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:10,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:10,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623954616] [2022-02-16 14:01:10,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623954616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:10,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606977047] [2022-02-16 14:01:10,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:01:10,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:10,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:10,844 INFO L229 MonitoredProcess]: Starting monitored process 637 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:10,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (637)] Waiting until timeout for monitored process [2022-02-16 14:01:11,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:01:11,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:01:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:12,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:01:12,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 89 [2022-02-16 14:01:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:12,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:12,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:12,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 112 [2022-02-16 14:01:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:12,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606977047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:12,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:12,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-02-16 14:01:12,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670241773] [2022-02-16 14:01:12,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:12,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-16 14:01:12,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:12,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-16 14:01:12,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-02-16 14:01:12,791 INFO L87 Difference]: Start difference. First operand 464 states and 1358 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:13,753 INFO L93 Difference]: Finished difference Result 711 states and 1808 transitions. [2022-02-16 14:01:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-16 14:01:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:13,754 INFO L225 Difference]: With dead ends: 711 [2022-02-16 14:01:13,754 INFO L226 Difference]: Without dead ends: 705 [2022-02-16 14:01:13,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-02-16 14:01:13,755 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 140 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:13,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 314 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 892 Invalid, 0 Unknown, 503 Unchecked, 0.3s Time] [2022-02-16 14:01:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-16 14:01:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 464. [2022-02-16 14:01:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.9330453563714904) internal successors, (1358), 463 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1358 transitions. [2022-02-16 14:01:13,761 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1358 transitions. Word has length 21 [2022-02-16 14:01:13,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:13,761 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1358 transitions. [2022-02-16 14:01:13,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1358 transitions. [2022-02-16 14:01:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:13,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:13,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:13,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (637)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:13,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 637 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable637 [2022-02-16 14:01:13,976 INFO L402 AbstractCegarLoop]: === Iteration 639 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1581797130, now seen corresponding path program 617 times [2022-02-16 14:01:13,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:13,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947033132] [2022-02-16 14:01:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:13,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:14,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:14,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947033132] [2022-02-16 14:01:14,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947033132] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:14,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068587] [2022-02-16 14:01:14,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:01:14,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:14,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:14,182 INFO L229 MonitoredProcess]: Starting monitored process 638 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:14,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (638)] Waiting until timeout for monitored process [2022-02-16 14:01:14,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-16 14:01:14,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:01:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:15,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 135 [2022-02-16 14:01:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:15,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:16,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:16,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2022-02-16 14:01:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:16,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:16,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:16,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-02-16 14:01:16,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756517820] [2022-02-16 14:01:16,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:16,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:01:16,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:01:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:01:16,282 INFO L87 Difference]: Start difference. First operand 464 states and 1358 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:20,325 INFO L93 Difference]: Finished difference Result 1113 states and 2562 transitions. [2022-02-16 14:01:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-16 14:01:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:20,327 INFO L225 Difference]: With dead ends: 1113 [2022-02-16 14:01:20,327 INFO L226 Difference]: Without dead ends: 1069 [2022-02-16 14:01:20,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=767, Invalid=6543, Unknown=0, NotChecked=0, Total=7310 [2022-02-16 14:01:20,328 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 520 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 2670 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:20,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 596 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2670 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-16 14:01:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-02-16 14:01:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 477. [2022-02-16 14:01:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.957983193277311) internal successors, (1408), 476 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:20,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1408 transitions. [2022-02-16 14:01:20,336 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1408 transitions. Word has length 21 [2022-02-16 14:01:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:20,336 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 1408 transitions. [2022-02-16 14:01:20,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1408 transitions. [2022-02-16 14:01:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:20,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:20,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:20,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (638)] Ended with exit code 0 [2022-02-16 14:01:20,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,638 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:20,538 INFO L402 AbstractCegarLoop]: === Iteration 640 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:20,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1187502388, now seen corresponding path program 618 times [2022-02-16 14:01:20,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:20,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365018369] [2022-02-16 14:01:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:20,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:20,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:20,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365018369] [2022-02-16 14:01:20,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365018369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:20,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579835625] [2022-02-16 14:01:20,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:01:20,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:20,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:20,701 INFO L229 MonitoredProcess]: Starting monitored process 639 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:20,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (639)] Waiting until timeout for monitored process [2022-02-16 14:01:21,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:01:21,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-16 14:01:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:21,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:01:21,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 118 [2022-02-16 14:01:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:22,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:22,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:22,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 147 [2022-02-16 14:01:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:22,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579835625] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:22,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:22,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-16 14:01:22,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986387912] [2022-02-16 14:01:22,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:22,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:01:22,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:01:22,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:01:22,721 INFO L87 Difference]: Start difference. First operand 477 states and 1408 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:23,463 INFO L93 Difference]: Finished difference Result 747 states and 1896 transitions. [2022-02-16 14:01:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-16 14:01:23,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:23,464 INFO L225 Difference]: With dead ends: 747 [2022-02-16 14:01:23,464 INFO L226 Difference]: Without dead ends: 729 [2022-02-16 14:01:23,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:01:23,465 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 142 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:23,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 242 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 818 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-02-16 14:01:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-02-16 14:01:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 480. [2022-02-16 14:01:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.951983298538622) internal successors, (1414), 479 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1414 transitions. [2022-02-16 14:01:23,472 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1414 transitions. Word has length 21 [2022-02-16 14:01:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:23,472 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1414 transitions. [2022-02-16 14:01:23,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1414 transitions. [2022-02-16 14:01:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:23,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:23,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:23,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (639)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:23,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,639 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:23,673 INFO L402 AbstractCegarLoop]: === Iteration 641 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:23,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1572484570, now seen corresponding path program 619 times [2022-02-16 14:01:23,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:23,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950394834] [2022-02-16 14:01:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:23,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:23,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:23,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950394834] [2022-02-16 14:01:23,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950394834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:23,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412658137] [2022-02-16 14:01:23,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:01:23,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:23,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:23,948 INFO L229 MonitoredProcess]: Starting monitored process 640 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:23,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (640)] Waiting until timeout for monitored process [2022-02-16 14:01:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:01:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:24,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 105 [2022-02-16 14:01:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:25,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:25,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:25,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 112 [2022-02-16 14:01:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:25,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412658137] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:25,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:25,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-02-16 14:01:25,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720578251] [2022-02-16 14:01:25,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:25,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:25,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:25,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:25,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:25,935 INFO L87 Difference]: Start difference. First operand 480 states and 1414 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:27,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:27,313 INFO L93 Difference]: Finished difference Result 837 states and 2084 transitions. [2022-02-16 14:01:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-16 14:01:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:27,315 INFO L225 Difference]: With dead ends: 837 [2022-02-16 14:01:27,315 INFO L226 Difference]: Without dead ends: 811 [2022-02-16 14:01:27,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:01:27,315 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 200 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:27,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 378 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-16 14:01:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-02-16 14:01:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 472. [2022-02-16 14:01:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.932059447983015) internal successors, (1381), 471 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1381 transitions. [2022-02-16 14:01:27,322 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1381 transitions. Word has length 21 [2022-02-16 14:01:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:27,322 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1381 transitions. [2022-02-16 14:01:27,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1381 transitions. [2022-02-16 14:01:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:27,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:27,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:27,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (640)] Ended with exit code 0 [2022-02-16 14:01:27,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2022-02-16 14:01:27,528 INFO L402 AbstractCegarLoop]: === Iteration 642 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1660109400, now seen corresponding path program 620 times [2022-02-16 14:01:27,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:27,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019767456] [2022-02-16 14:01:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:27,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:27,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:27,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019767456] [2022-02-16 14:01:27,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019767456] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:27,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262793664] [2022-02-16 14:01:27,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:01:27,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:27,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:27,673 INFO L229 MonitoredProcess]: Starting monitored process 641 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:27,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (641)] Waiting until timeout for monitored process [2022-02-16 14:01:28,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:01:28,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:28,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:01:28,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:29,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:01:29,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 108 [2022-02-16 14:01:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:29,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:29,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:29,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 144 [2022-02-16 14:01:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:29,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262793664] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:29,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:29,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-02-16 14:01:29,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825230584] [2022-02-16 14:01:29,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:29,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:29,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:29,945 INFO L87 Difference]: Start difference. First operand 472 states and 1381 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:31,208 INFO L93 Difference]: Finished difference Result 766 states and 1985 transitions. [2022-02-16 14:01:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-16 14:01:31,208 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:31,209 INFO L225 Difference]: With dead ends: 766 [2022-02-16 14:01:31,209 INFO L226 Difference]: Without dead ends: 750 [2022-02-16 14:01:31,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:01:31,210 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 133 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:31,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 244 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1363 Invalid, 0 Unknown, 150 Unchecked, 0.5s Time] [2022-02-16 14:01:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-02-16 14:01:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 472. [2022-02-16 14:01:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.9426751592356686) internal successors, (1386), 471 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1386 transitions. [2022-02-16 14:01:31,216 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1386 transitions. Word has length 21 [2022-02-16 14:01:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:31,216 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1386 transitions. [2022-02-16 14:01:31,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1386 transitions. [2022-02-16 14:01:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:31,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:31,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:31,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (641)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:31,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2022-02-16 14:01:31,423 INFO L402 AbstractCegarLoop]: === Iteration 643 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash 179117592, now seen corresponding path program 621 times [2022-02-16 14:01:31,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:31,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686007711] [2022-02-16 14:01:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:31,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:31,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:31,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686007711] [2022-02-16 14:01:31,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686007711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:31,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72586257] [2022-02-16 14:01:31,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:01:31,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:31,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:31,653 INFO L229 MonitoredProcess]: Starting monitored process 642 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:31,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (642)] Waiting until timeout for monitored process [2022-02-16 14:01:32,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:01:32,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:32,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:01:32,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:32,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 108 [2022-02-16 14:01:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:32,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:33,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:33,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 127 [2022-02-16 14:01:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:33,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72586257] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:33,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:33,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-02-16 14:01:33,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116508160] [2022-02-16 14:01:33,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:33,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-16 14:01:33,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:33,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-16 14:01:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-02-16 14:01:33,378 INFO L87 Difference]: Start difference. First operand 472 states and 1386 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:34,799 INFO L93 Difference]: Finished difference Result 744 states and 1895 transitions. [2022-02-16 14:01:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-16 14:01:34,800 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:34,801 INFO L225 Difference]: With dead ends: 744 [2022-02-16 14:01:34,801 INFO L226 Difference]: Without dead ends: 722 [2022-02-16 14:01:34,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2022-02-16 14:01:34,801 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 156 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:34,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 246 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-16 14:01:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-02-16 14:01:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 467. [2022-02-16 14:01:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.924892703862661) internal successors, (1363), 466 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1363 transitions. [2022-02-16 14:01:34,807 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1363 transitions. Word has length 21 [2022-02-16 14:01:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:34,807 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1363 transitions. [2022-02-16 14:01:34,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1363 transitions. [2022-02-16 14:01:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:34,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:34,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:34,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (642)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:35,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2022-02-16 14:01:35,009 INFO L402 AbstractCegarLoop]: === Iteration 644 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:35,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:35,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2047289900, now seen corresponding path program 622 times [2022-02-16 14:01:35,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:35,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160654743] [2022-02-16 14:01:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:35,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:35,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:35,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160654743] [2022-02-16 14:01:35,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160654743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:35,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184030840] [2022-02-16 14:01:35,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:01:35,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:35,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:35,124 INFO L229 MonitoredProcess]: Starting monitored process 643 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:35,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (643)] Waiting until timeout for monitored process [2022-02-16 14:01:35,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:01:35,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:35,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-16 14:01:35,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:36,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:01:36,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 89 [2022-02-16 14:01:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:36,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:36,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:36,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 144 [2022-02-16 14:01:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:36,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184030840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:36,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:36,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-02-16 14:01:36,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933110731] [2022-02-16 14:01:36,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:36,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-16 14:01:36,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:36,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-16 14:01:36,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-16 14:01:36,967 INFO L87 Difference]: Start difference. First operand 467 states and 1363 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:37,647 INFO L93 Difference]: Finished difference Result 622 states and 1695 transitions. [2022-02-16 14:01:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-16 14:01:37,647 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:37,648 INFO L225 Difference]: With dead ends: 622 [2022-02-16 14:01:37,648 INFO L226 Difference]: Without dead ends: 588 [2022-02-16 14:01:37,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-02-16 14:01:37,648 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 121 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:37,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 226 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 900 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2022-02-16 14:01:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-02-16 14:01:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 481. [2022-02-16 14:01:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.9479166666666665) internal successors, (1415), 480 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1415 transitions. [2022-02-16 14:01:37,654 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1415 transitions. Word has length 21 [2022-02-16 14:01:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:37,654 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1415 transitions. [2022-02-16 14:01:37,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1415 transitions. [2022-02-16 14:01:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:37,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:37,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:37,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (643)] Forceful destruction successful, exit code 0 [2022-02-16 14:01:37,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,643 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:37,867 INFO L402 AbstractCegarLoop]: === Iteration 645 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash 554083472, now seen corresponding path program 623 times [2022-02-16 14:01:37,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:37,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238235042] [2022-02-16 14:01:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:37,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:38,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:38,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238235042] [2022-02-16 14:01:38,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238235042] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:38,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524610819] [2022-02-16 14:01:38,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:01:38,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:38,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:38,013 INFO L229 MonitoredProcess]: Starting monitored process 644 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:38,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (644)] Waiting until timeout for monitored process [2022-02-16 14:01:38,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:01:38,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:38,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:01:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:38,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:01:38,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 115 [2022-02-16 14:01:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:39,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:39,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:39,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 120 [2022-02-16 14:01:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:39,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524610819] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:39,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:39,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-16 14:01:39,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542287675] [2022-02-16 14:01:39,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:39,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:01:39,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:01:39,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:01:39,611 INFO L87 Difference]: Start difference. First operand 481 states and 1415 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:01:40,104 INFO L93 Difference]: Finished difference Result 604 states and 1682 transitions. [2022-02-16 14:01:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:01:40,104 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-16 14:01:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:01:40,105 INFO L225 Difference]: With dead ends: 604 [2022-02-16 14:01:40,105 INFO L226 Difference]: Without dead ends: 590 [2022-02-16 14:01:40,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-02-16 14:01:40,106 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:01:40,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 197 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 890 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-02-16 14:01:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-02-16 14:01:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 487. [2022-02-16 14:01:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.960905349794239) internal successors, (1439), 486 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1439 transitions. [2022-02-16 14:01:40,112 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1439 transitions. Word has length 21 [2022-02-16 14:01:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:01:40,112 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1439 transitions. [2022-02-16 14:01:40,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:01:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1439 transitions. [2022-02-16 14:01:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-16 14:01:40,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:01:40,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:01:40,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (644)] Ended with exit code 0 [2022-02-16 14:01:40,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2022-02-16 14:01:40,331 INFO L402 AbstractCegarLoop]: === Iteration 646 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:01:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:01:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1578758572, now seen corresponding path program 624 times [2022-02-16 14:01:40,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:01:40,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626002937] [2022-02-16 14:01:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:01:40,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:01:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:01:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:40,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:01:40,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626002937] [2022-02-16 14:01:40,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626002937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:01:40,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930758265] [2022-02-16 14:01:40,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:01:40,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:01:40,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:01:40,463 INFO L229 MonitoredProcess]: Starting monitored process 645 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-16 14:01:40,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (645)] Waiting until timeout for monitored process [2022-02-16 14:01:40,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-16 14:01:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:01:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-16 14:01:40,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:01:41,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:01:41,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 104 [2022-02-16 14:01:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:41,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:01:42,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:01:42,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 90 [2022-02-16 14:01:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:01:42,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930758265] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:01:42,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:01:42,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-16 14:01:42,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479664108] [2022-02-16 14:01:42,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:01:42,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-16 14:01:42,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:01:42,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-16 14:01:42,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-02-16 14:01:42,248 INFO L87 Difference]: Start difference. First operand 487 states and 1439 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)